x402watch

24,523 paid endpoints are listed. 23,664 answered a real 402 at the last check.

Every x402 endpoint on the Coinbase Bazaar and x402scan, probed unpaid every six hours. A listing tells you the price a seller wrote down. This tells you whether the endpoint is reachable, whether it charges what it declared, and how fast it answers. Ranked by an assay score out of 100.

Last check 2026-10-03 16:28 UTC · 24,523 probed

23,664 answering 402332 down394 rejecting133 no paywall2,436 price drift
  1. 95api.delx.ai/api/v1/x402/similarityNormalized string similarity (Levenshtein) for $0.001 USDC. Call when you need this bounded result without an API key or subscription. Returns machine-readable JSON via x402 on Base or Solana. Limitation: results cover only the supplied input or one bounded public endpoint at request time; callers must verify before acting.$0.001 Base701 ms1 payers100% up
  2. 95api.delx.ai/api/v1/x402/authorization-scheme-identifyAuthorization Scheme Identify: identifies an Authorization scheme without exposing or validating credentials using only bounded caller-supplied values. Call when you need a bounded authorization scheme identify result before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for Authorization Scheme Identify as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base…$0.001 Base861 ms1 payers100% up
  3. 95api.delx.ai/api/v1/x402/overroundOverround/vig from a set of mutually exclusive implied probs. Call when measuring book margin before de-vigging. Returns overround and sum of probs as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.$0.001 Base845 ms1 payers100% up
  4. 95api.delx.ai/api/v1/x402/csv-join-by-keyCSV Join By Key: inner-joins two bounded CSV tables on one key column using only bounded caller-supplied values. Call when you need a bounded csv join by key result before an agent hands structured data or a batch plan to a downstream tool with a stricter contract. Returns the bounded transformation or validation finding with counts, normalized values, and a versioned result contract for CSV Join By Key as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base or Solana. First-party,…$0.001 Base877 ms1 payers100% up
  5. 95api.delx.ai/api/v1/x402/iso3166-country-lookupLookup country name from a static ISO3166-1 alpha-2 table subset. Call when labeling country codes offline. Returns name and code as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.$0.001 Base881 ms1 payers100% up
  6. 95api.delx.ai/api/v1/x402/case-camelConvert text to lowerCamelCase for JSON property naming. Call when you need this bounded result before handing data to a downstream tool. Returns deterministic machine-readable JSON for $0.001 USDC via x402 on Base. Honest limit: execution uses only caller-supplied data in memory; it does not call a paid upstream, retain input, search the web, read a live RPC, or invoke a media generator. Results are advisory; the caller owns authorization, budgets, and production controls.$0.001 Base848 ms1 payers100% up
  7. 95api.delx.ai/api/v1/x402/cache-policy-auditAudit cache headers for missing policy and sensitive public-cache exposure. Use it before an autonomous workflow acts on untrusted input, changes an API, retries a request, or evaluates production reliability. Returns bounded machine-readable JSON for $0.002 USDC via x402 on Base or Solana. Execution is deterministic, first-party, local-only, stateless, and does not call an upstream provider; structured validation failures are not billed.$0.002 Base875 ms1 payers100% up
  8. 95api.delx.ai/api/v1/x402/batch-result-summaryBatch Result Summary: summarizes success, failure, pending, and unknown batch statuses using only bounded caller-supplied values. Call when you need a bounded batch result summary result before an agent hands structured data or a batch plan to a downstream tool with a stricter contract. Returns the bounded transformation or validation finding with counts, normalized values, and a versioned result contract for Batch Result Summary as versioned deterministic JSON. Price: $0.001 USDC via x402 on B…$0.001 Base837 ms1 payers100% up
  9. 95api.delx.ai/api/v1/x402/zip-keys-valuesZip key and value lists into an object. Call when you rebuild maps from parallel agent arrays. Returns object and count for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.$0.001 Base839 ms1 payers100% up
  10. 95api.delx.ai/api/v1/x402/cookie-domain-matchCookie Domain Match: evaluates host-only or Domain cookie matching for a request host using only bounded caller-supplied values. Call when you need a bounded cookie domain match result before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for Cookie Domain Match as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base or Solana. First-party, stateless, memory-…$0.001 Base821 ms1 payers100% up
  11. 95api.delx.ai/api/v1/x402/transfer-encoding-checkTransfer Encoding Check: checks transfer-coding order and whether chunked appears only last using only bounded caller-supplied values. Call when you need a bounded transfer encoding check result before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for Transfer Encoding Check as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base or Solana. First-party, stat…$0.001 Base879 ms1 payers100% up
  12. 95api.delx.ai/api/v1/x402/expected-log-growthApprox expected log bankroll growth for a binary bet fraction. Call when comparing bet sizes by growth rate under true_prob (advisory). Returns expected log growth as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.$0.001 Base749 ms1 payers100% up
  13. 95api.delx.ai/api/v1/x402/agent-result-citation-checkAgent Result Citation Check: checks bounded citation objects for URL and title fields using only bounded caller-supplied values. Call when you need a bounded agent result citation check result before paying for or accepting an x402 or agent delivery assembled from caller-supplied challenge and result metadata. Returns contract-specific checks, normalized evidence, mismatch reasons, and an explicit acceptance or rejection status for Agent Result Citation Check as versioned deterministic JSON. Pr…$0.001 Base845 ms1 payers100% up
  14. 95api.delx.ai/api/v1/x402/wei-ether-convertConvert between wei and ether using fixed 1e18 scaling without RPC — call when converting wei↔ether with fixed 1e18 scaling. Use for chain input hygiene without live RPC—adjacent to OneSource-class small chain reads, but static/local only so rights and margin stay clear. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, and no claim of live chain tip, web searc…$0.003 Base627 ms1 payers100% up
  15. 95api.delx.ai/api/v1/x402/x402-settlement-network-checkX402 Settlement Network Check: compares settlement chain with the accepted challenge network using only bounded caller-supplied values. Call when you need a bounded x402 settlement network check result before paying for or accepting an x402 or agent delivery assembled from caller-supplied challenge and result metadata. Returns contract-specific checks, normalized evidence, mismatch reasons, and an explicit acceptance or rejection status for X402 Settlement Network Check as versioned determinist…$0.001 Base770 ms1 payers100% up
  16. 95api.delx.ai/api/v1/x402/eth-to-weiScale ether amounts into wei integer strings for transfers and tx value. Call when preparing value fields, allowances, or transfers denominated in ETH. Returns wei integer string and eth input as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.$0.001 Base756 ms1 payers100% up
  17. 95api.delx.ai/api/v1/x402/slugifyConvert text to a URL-safe slug for $0.001 USDC. Call when you need this bounded result without an API key or subscription. Returns machine-readable JSON via x402 on Base or Solana. Limitation: results cover only the supplied input or one bounded public endpoint at request time; callers must verify before acting.$0.001 Base687 ms1 payers100% up
  18. 95api.delx.ai/api/v1/x402/retention-policy-checkCompare declared retention with a maximum policy window. Use it as a bounded preflight or analysis step inside an enterprise agent workflow before data, policy, integration, security, or commercial decisions reach production. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base or Solana. Execution is first-party, local-only, stateless, memory-only, and has no paid upstream or input retention. Results are advisory; the caller remains responsible for authorization and pro…$0.003 Base664 ms1 payers100% up
  19. 95api.delx.ai/api/v1/x402/slo-complianceMeasure achieved reliability against an SLO target from good and total events. Use it before an autonomous workflow acts on untrusted input, changes an API, retries a request, or evaluates production reliability. Returns bounded machine-readable JSON for $0.002 USDC via x402 on Base or Solana. Execution is deterministic, first-party, local-only, stateless, and does not call an upstream provider; structured validation failures are not billed.$0.002 Base608 ms1 payers100% up
  20. 95api.delx.ai/api/v1/x402/pluralize-liteLightweight English pluralization helper. Call when you label counts in agent messages without i18n frameworks. Returns pluralized word with count for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.$0.001 Base574 ms1 payers100% up
  21. 95api.delx.ai/api/v1/x402/multi-outcome-kellyProportional Kelly-like stakes across exclusive outcomes. Call when allocating bankroll across multi-outcome prediction markets. Returns stakes and fractions per outcome as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.$0.001 Base609 ms1 payers100% up
  22. 95api.delx.ai/api/v1/x402/evm-transfer-recipient-checkEVM Transfer Recipient Check: compares an encoded recipient address with the intended recipient using only bounded caller-supplied values. Call when you need a bounded evm transfer recipient check result before signing, submitting, replacing, or accepting an EVM/Base transaction assembled from caller-owned data. Returns normalized transaction evidence, calculated budget or shape findings, and a fail-closed preflight status for EVM Transfer Recipient Check as versioned deterministic JSON. Price:…$0.001 Base730 ms1 payers100% up
  23. 95api.delx.ai/api/v1/x402/evm-signature-v-classifyEVM Signature V Classify: classifies common signature recovery and EIP-155 v values using only bounded caller-supplied values. Call when you need a bounded evm signature v classify result before signing, submitting, replacing, or accepting an EVM/Base transaction assembled from caller-owned data. Returns normalized transaction evidence, calculated budget or shape findings, and a fail-closed preflight status for EVM Signature V Classify as versioned deterministic JSON. Price: $0.001 USDC via x40…$0.001 Base537 ms1 payers100% up
  24. 95api.delx.ai/api/v1/x402/bytes-formatHuman-readable byte sizes. Call when presenting file sizes, cache usage, or download progress to users. Returns a human string like 1.5 KB from a byte count. $0.001 USDC per successful call via x402 on Base or Solana—deterministic first-party JSON, no API key, no subscription, and nothing is billed on structured validation errors.$0.001 Base560 ms1 payers100% up
  25. 95api.delx.ai/api/v1/x402/openapi-operation-indexTurn an OpenAPI document into a compact operation index for planning and tool selection. Use it before an autonomous workflow acts on untrusted input, changes an API, retries a request, or evaluates production reliability. Returns bounded machine-readable JSON for $0.002 USDC via x402 on Base or Solana. Execution is deterministic, first-party, local-only, stateless, and does not call an upstream provider; structured validation failures are not billed.$0.002 Base581 ms1 payers100% up
  26. 95api.delx.ai/api/v1/x402/binary-fair-priceMap a true probability into a binary contract fair price in [0,1]. Call when pricing yes/no markets from your probability model. Returns fair price in [0,1] as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.$0.001 Base535 ms1 payers100% up
  27. 95api.delx.ai/api/v1/x402/json-boolean-coerceJSON Boolean Coerce: coerces explicit boolean tokens while reporting rejected values using only bounded caller-supplied values. Call when you need a bounded json boolean coerce result before an agent hands structured data or a batch plan to a downstream tool with a stricter contract. Returns the bounded transformation or validation finding with counts, normalized values, and a versioned result contract for JSON Boolean Coerce as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base…$0.001 Base537 ms1 payers100% up
  28. 95api.delx.ai/api/v1/x402/bool-andBoolean AND of two coerced values. Call when you combine agent preflight gates. Returns AND result for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.$0.001 Base587 ms1 payers100% up
  29. 95api.delx.ai/api/v1/x402/open-entities-searchSearch bounded Wikidata entity metadata for $0.001 USDC. Returns stable IDs, labels, descriptions and source links for public places, companies and concepts—not geocoding, navigation, contact data, personal profiling or general web search.$0.001 Base529 ms1 payers100% up
  30. 95api.delx.ai/api/v1/x402/data-classificationClassify a field-name inventory for likely sensitive data without inspecting values. Use it as a bounded preflight or analysis step inside an enterprise agent workflow before data, policy, integration, security, or commercial decisions reach production. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base or Solana. Execution is first-party, local-only, stateless, memory-only, and has no paid upstream or input retention. Results are advisory; the caller remains responsib…$0.003 Base521 ms1 payers100% up
  31. 95api.delx.ai/api/v1/x402/agent-result-error-shape-checkAgent Result Error Shape Check: checks an agent error object for code, message, and retryability using only bounded caller-supplied values. Call when you need a bounded agent result error shape check result before paying for or accepting an x402 or agent delivery assembled from caller-supplied challenge and result metadata. Returns contract-specific checks, normalized evidence, mismatch reasons, and an explicit acceptance or rejection status for Agent Result Error Shape Check as versioned deter…$0.001 Base489 ms1 payers100% up
  32. 95api.delx.ai/api/v1/x402/evm-priority-fee-ratioEVM Priority Fee Ratio: calculates the priority-fee share of the total fee cap using only bounded caller-supplied values. Call when you need a bounded evm priority fee ratio result before signing, submitting, replacing, or accepting an EVM/Base transaction assembled from caller-owned data. Returns normalized transaction evidence, calculated budget or shape findings, and a fail-closed preflight status for EVM Priority Fee Ratio as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base…$0.001 Base473 ms1 payers100% up
  33. 95api.delx.ai/api/v1/x402/frame-ancestors-checkFrame Ancestors Check: checks whether a CSP frame-ancestors directive contains a required source using only bounded caller-supplied values. Call when you need a bounded frame ancestors check result before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for Frame Ancestors Check as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base or Solana. First-party, sta…$0.001 Base489 ms1 payers100% up
  34. 95api.delx.ai/api/v1/x402/link-header-parseLink Header Parse: parses bounded Link header targets and relation parameters using only bounded caller-supplied values. Call when you need a bounded link header parse result before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for Link Header Parse as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base or Solana. First-party, stateless, memory-only executi…$0.001 Base476 ms1 payers100% up
  35. 95api.delx.ai/api/v1/x402/is-primePrimality check. Call for teaching demos, ID heuristics, or lightweight number filters (bounded integers). Returns whether n is prime with a clear boolean field. $0.001 USDC per successful call via x402 on Base or Solana—deterministic first-party JSON, no API key, no subscription, and nothing is billed on structured validation errors.$0.001 Base477 ms1 payers100% up
  36. 95api.delx.ai/api/v1/x402/text-sha256SHA-256 hex digest of UTF-8 text. Call when content addressing or dupe keys for text. Returns sha256 as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.$0.001 Base472 ms1 payers100% up
  37. 95api.delx.ai/api/v1/x402/spf-record-flagsDetect common SPF mechanisms present in a TXT record. Call when quick SPF mechanism inventory without DNS lookup. Returns flags for include/a/mx/all as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.$0.001 Base459 ms1 payers100% up
  38. 95api.delx.ai/api/v1/x402/set-intersectSet intersection of two lists. Call when you find shared agent tags/IDs. Returns intersection items and count for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.$0.001 Base488 ms1 payers100% up
  39. 95api.delx.ai/api/v1/x402/csv-delimiter-detectCSV Delimiter Detect: scores common delimiters from bounded CSV text using only bounded caller-supplied values. Call when you need a bounded csv delimiter detect result before an agent hands structured data or a batch plan to a downstream tool with a stricter contract. Returns the bounded transformation or validation finding with counts, normalized values, and a versioned result contract for CSV Delimiter Detect as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base or Solana. Fir…$0.001 Base498 ms1 payers100% up
  40. 95api.delx.ai/api/v1/x402/reliability-curveReliability diagram points (mean forecast vs hit rate per bin). Call when plotting calibration without a notebook stack. Returns bins with mean_forecast and hit_rate as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.$0.001 Base477 ms1 payers100% up
  41. 95api.delx.ai/api/v1/x402/ordinalFormat an integer as an English ordinal (1st, 2nd, 3rd…). Call when you need human-facing ranks or step labels for agent UIs. Returns ordinal string and n for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.$0.001 Base474 ms1 payers100% up
  42. 95api.delx.ai/api/v1/x402/logitLogit transform log(p/(1−p)) for probability-space models. Call when featureizing probabilities for linear models offline. Returns logit value as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.$0.001 Base470 ms1 payers100% up
  43. 95api.delx.ai/api/v1/x402/title-caseTitle-case text for agents. Call this when you need headline-ready casing for titles, product names, or UI labels mid-workflow. Returns structured JSON with the title-cased string and a tiny receipt schema. $0.001 USDC per successful call via x402 on Base or Solana—deterministic first-party JSON, no API key, no subscription, and nothing is billed on structured validation errors.$0.001 Base464 ms1 payers100% up
  44. 95api.delx.ai/api/v1/x402/fraction-to-bpsConvert fractional rates into basis points for trading UIs. Call when you need bps labels from internal 0–1 fee or edge fractions. Returns bps = fraction*10000 as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.$0.001 Base463 ms1 payers100% up
  45. 95api.delx.ai/api/v1/x402/mime-from-extGuess MIME type from file extension. Call when you set Content-Type hints for agent uploads. Returns mime, ext, known for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.$0.001 Base452 ms1 payers100% up
  46. 95api.delx.ai/api/v1/x402/evm-nonce-gap-checkEVM Nonce Gap Check: calculates the gap between pending and proposed transaction nonces using only bounded caller-supplied values. Call when you need a bounded evm nonce gap check result before signing, submitting, replacing, or accepting an EVM/Base transaction assembled from caller-owned data. Returns normalized transaction evidence, calculated budget or shape findings, and a fail-closed preflight status for EVM Nonce Gap Check as versioned deterministic JSON. Price: $0.001 USDC via x402 on B…$0.001 Base486 ms1 payers100% up
  47. 95api.delx.ai/api/v1/x402/evm-slippage-bounds-checkEVM Slippage Bounds Check: checks expected and minimum output against a maximum slippage policy using only bounded caller-supplied values. Call when you need a bounded evm slippage bounds check result before signing, submitting, replacing, or accepting an EVM/Base transaction assembled from caller-owned data. Returns normalized transaction evidence, calculated budget or shape findings, and a fail-closed preflight status for EVM Slippage Bounds Check as versioned deterministic JSON. Price: $0.00…$0.001 Base534 ms1 payers100% up
  48. 95api.delx.ai/api/v1/x402/is-blankCheck whether a string is empty or contains only whitespace. Call when you need this bounded result before handing data to a downstream tool. Returns deterministic machine-readable JSON for $0.001 USDC via x402 on Base. Honest limit: execution uses only caller-supplied data in memory; it does not call a paid upstream, retain input, search the web, read a live RPC, or invoke a media generator. Results are advisory; the caller owns authorization, budgets, and production controls.$0.001 Base422 ms1 payers100% up
  49. 95api.delx.ai/api/v1/x402/caa-issue-hostsExtract issue/issuewild hosts from CAA record texts. Call when inventorying allowed CAs from CAA answers. Returns hosts list as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.$0.001 Base366 ms1 payers100% up
  50. 95api.delx.ai/api/v1/x402/drawdown-pctDrawdown percent from peak to trough for risk reports. Call when measuring path risk on an equity or price series peak/trough pair. Returns drawdown percent as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.$0.001 Base395 ms1 payers100% up
  51. 95api.delx.ai/api/v1/x402/ob-mid-from-levelsCompute mid price from bid/ask top-of-book levels. Call when you have L1 bid and ask and need a mid for marks. Returns mid, spread_abs, and spread_bps as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.$0.001 Base363 ms1 payers100% up
  52. 95api.delx.ai/api/v1/x402/json-uuid-fields-checkJSON UUID Fields Check: checks selected fields for canonical UUID text shape using only bounded caller-supplied values. Call when you need a bounded json uuid fields check result before an agent hands structured data or a batch plan to a downstream tool with a stricter contract. Returns the bounded transformation or validation finding with counts, normalized values, and a versioned result contract for JSON UUID Fields Check as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base or…$0.001 Base358 ms1 payers100% up
  53. 95api.delx.ai/api/v1/x402/hex-prefixNormalize a hexadecimal string with optional prefix and even-length validation. Call when you need this bounded result before handing data to a downstream tool. Returns deterministic machine-readable JSON for $0.001 USDC via x402 on Base. Honest limit: execution uses only caller-supplied data in memory; it does not call a paid upstream, retain input, search the web, read a live RPC, or invoke a media generator. Results are advisory; the caller owns authorization, budgets, and production control…$0.001 Base353 ms1 payers100% up
  54. 95jsonrecon.com/extractConvert a public web page into concise, validated Schema.org JSON-LD for agents and automation. Supports 200+ entity types and can produce a useful page-level entity when existing markup is missing or incomplete. $0.01 USDC per successful request on Base. Call /check before paying. Payment authorization settles only after a successful response.$0.01 Base636 ms1 payers100% up
  55. 95chainverdict.xyz/v1/validate/iban/%3AibanValidate an IBAN structurally: country length rules, character set and the ISO 7064 mod-97 check. Deterministic. A structurally valid IBAN is not proof the account exists, is open, or belongs to the party you are paying.$0.001 Base368 ms1 payers100% up
  56. 95chainverdict.xyz/v1/data/portfolio/%3AaddrNative ETH and ERC-20 token balances for a Base address in one call, read live from chain at a stated block height.$0.004 Base501 ms1 payers100% up
  57. 95api.biotechcatalystsentinel.com/v1/eventsFDA drug-approval catalyst change stream for US-listed biotechs: every state change of every tracked catalyst — each PDUFA date as set, extended and resolved — with the real outcome (approval or CRL), the SEC filing quote and its EDGAR source, as a since-cursor delta feed. Use when you mirror the calendar and need date changes and outcomes as they land, not a snapshot. Accuracy AND coverage are free at GET /v1/accuracy. Flat price per request.$0.05 Base999 ms1 payers100% up
  58. 95vmi1759441.contaboserver.net/api/x402/ugc-product-videoCreate an about 15-second UGC-style product ad from a product image and details. Pay once via x402, then poll statusUrl for the MP4 download.$0.90 Base727 ms1 payers100% up
  59. 95x402-seller-0ay3.onrender.com/api/defi/protocolsTop DeFi protocols ranked by TVL (total value locked), highest first, source DefiLlama. Optional parameter: ?limit=<n> (1 to 100, default 20).$0.005 Base549 ms1 payers100% up
  60. 95oyapicks.app/api/x402/resolutionsOyaPicks: recently resolved prediction markets and their winning outcome$0.03 Base479 ms1 payers100% up
  61. 95ot-intel-api.onrender.com/ot/actor/sectorICS threat actors by sector. Pass ?sector=energy. Returns all groups targeting that sector from live MITRE ATT&CK ICS STIX data. Covers energy, water, manufacturing, oil-and-gas, chemical, transportation, nuclear.$0.03 Base653 ms1 payers100% up
  62. 95faultcode-diagnostic-mcp.bowling-anthony.workers.dev/v1/device/catalog/dtcs/P0300What a vehicle fault code means, with source-attributed generic and make-specific definitions and any disagreement between sources stated.$0.006 Base469 ms1 payers100% up
  63. 95defi-signals.org/defi/funding-ratesCross-venue perpetual funding rates (OKX, Kraken Futures, dYdX) for any major token. Per-venue annualized rates plus the cross-venue spread in percentage points — a ready-to-use funding arbitrage signal. Clean JSON for trading and research agents.$0.005 Base596 ms1 payers100% up
  64. 95telesint-api.onrender.com/darkwebDark web intelligence from Telegram: marketplace listings, forum chatter, access broker posts, credential shops, Tor site activity. Filters: severity, min_confidence, since, tag, sector, country, organization, limit, offset.$0.03 Base776 ms1 payers100% up
  65. 95shelf.thirdmade.net/probe/ens-lookupENS name resolution + reverse lookup via public Ethereum RPC.$0.001 Base672 ms1 payers100% up
  66. 95oyapicks.app/api/x402/arbitrageOyaPicks: live prediction-market data across Polymarket and Alpha Arcade, including cross-venue arbitrage gaps where the same outcome is priced differently.$0.05 Base751 ms1 payers100% up
  67. 95ot-intel-api.onrender.com/ot/campaignActive ICS campaign tracker. Pass ?sector=electric&status=active. Returns campaigns currently targeting a sector with actor attribution, start date, targeted geography, TTPs in use, and CVEs being exploited. No free equivalent for live campaign status.$0.05 Base745 ms1 payers100% up
  68. 95api.aitrailblazer.net/v1/top-stressedTop stressed crypto issuers from the current DeltaSignal slice.$0.05 Base707 ms1 payers100% up
  69. 95voice.forgemesh.io/v1/tts/batch-longBatch text-to-speech: synthesize up to 20 text items in a single call, standard voices only, for 501-2000 total characters, returns JSON with base64 WAV audio plus duration and sample rate per item. Use it to: batch-voice a longer set of messages, produce audio for a multi-section script or FAQ, generate several paragraph-length voice clips in one request without repeated calls. USDC on Base via x402.$0.005 Base574 ms1 payers100% up
  70. 95voice.forgemesh.io/v1/audio/speech-longOpenAI-compatible text-to-speech endpoint (input, voice, response_format) for drop-in use with existing OpenAI TTS clients, 1 of 10 standard voices, for 501-2000 characters, WAV/FLAC/OGG output. Use it to: voice a longer OpenAI-formatted request without an API key, migrate an existing TTS integration to pay-per-call pricing, synthesize extended text through a familiar request shape. USDC on Base via x402.$0.003 Base399 ms1 payers100% up
  71. 95voice.forgemesh.io/v1/tts/customExpressive text-to-speech in any of 20 voices: 10 standard (M1-M5, F1-F5) plus 10 personas (Storyteller, Narrator, Announcer, Urgent, Velvet, Sage, Spark, Anchor, Echo, Assistant), with speed and quality control, up to 500 characters, WAV output. Use it to: voice a game character, narrate a branded assistant reply, add a dramatic announcer line, give a chatbot personality-driven audio. USDC on Base.$0.005 Base387 ms1 payers100% up
  72. 95voice.forgemesh.io/v1/tts/pro-longText-to-speech with speed (0.7x-2.0x) and quality-step (1-100) control, 1 of 10 standard voices across 31 languages, for 501-2000 characters, returned as WAV audio. Use it to: pace a longer narration like a podcast intro, read a multi-paragraph script at a chosen speed, produce a slow deliberate reading of instructions, voice an extended alert or briefing. USDC on Base via x402.$0.006 Base387 ms1 payers100% up
  73. 95voice.forgemesh.io/v1/tts/proText-to-speech with speed (0.7x-2.0x) and quality-step (1-100) control, 1 of 10 standard voices across 31 languages, up to 500 characters, returned as WAV audio. Use it to: speak an urgent alert faster, slow a reading for clarity, tune synthesis quality against latency, produce a paced voice cue for a UI, generate a rushed or calm-toned notification. USDC on Base via x402, no API key.$0.003 Base380 ms1 payers100% up
  74. 95voice.forgemesh.io/v1/tts/base-longText-to-speech synthesis in 1 of 10 standard voices (M1-M5 male, F1-F5 female) across 31 languages, for longer text from 501 up to 2000 characters, returned as inline WAV audio. Use it to: read a full paragraph aloud, narrate a multi-sentence agent summary, voice an email or article excerpt, turn a longer LLM response into spoken audio, generate audio for a script section. USDC on Base via x402, no API key.$0.003 Base341 ms1 payers100% up
  75. 95numberintel.dev/v1/attestSigned settlement attestation: we make a REAL x402 purchase from your target endpoint (up to $0.1), grade the delivered response against its advertised schema, and return an EIP-191-signed attestation embedding the on-chain USDC receipt. Proof-of-real-delivery for directories, reputation systems and sellers.$0.25 Base592 ms1 payers100% up
  76. 95api.onhub.ai/v1/searchGrounded Google Search answers with attributable HTTPS sources.$0.025 Base584 ms1 payers100% up
  77. 95library.proofivy.com/the_phoblographerThe Phoblographer content lookup. Include the content URL or slug in the request using the content_url key$0.07 Base357 ms1 payers100% up
  78. 95audit.liquidlogicx.com/api/auditLiquid Logic Agent — wallet audit. Returns a structured USDC spend summary for an agent wallet from the public ledger. Site: https://liquidlogicx.com$0.05 Base564 ms1 payers100% up
  79. 95cron402-api.user-defaults.workers.dev/v1/crons/topup/10cron402: add 10 prepaid run credits ($0.08) to an existing job. Reactivates exhausted jobs.$0.08 Base671 ms1 payers100% up
  80. 95agent.connskill.com/v1/image-searchGoogle Images results for a keyword: image URL, page URL and alt text$0.03 Base760 ms1 payers100% up
  81. 95api.socialfetch.dev/v1/tiktok/profiles/:handleGet a TikTok profile by handle.$0.014 Base381 ms1 payers100% up
  82. 95ioswarm.io/api/v1/search/reportOne-call research brief: live web search synthesized into a cited bullet report — every claim tied to a source URL from the results. Same shape as /api/v1/search (query, optional k/freshness/domains) with a written summary on top. $0.05 per call over x402 — no account, no API key.$0.05 Base821 ms1 payers100% up
  83. 95jsonrecon.com/extract/liteReturn the Schema.org structured data already published on a public web page. Navigation-only results are marked low information so agents can choose Full extraction. $0.005 USDC per successful request on Base. Call /check before paying. Payment authorization settles only after a successful response.$0.005 Base464 ms1 payers100% up
  84. 95zendiq-backend.onrender.com/v1/agent/analyseSolana swap triage for AI agents. Returns a Safe / Protect / Refuse verdict for a proposed swap: token risk screening, sandwich-attack exposure, and the priority fee and Jito tip to use. Call it before signing a swap. Advisory only: builds no transaction and never handles keys. Pay in USDC; network fees are sponsored. Full contract: GET /v1/agent. Terms: https://zendiq.ai/agents/terms/$0.01 Solana776 ms1 payers100% up
  85. 95www.thelatentlounge.com/api/play/inductionPaid single-attempt reasoning puzzle for AI agents at The Latent Lounge — infer a hidden string transformation from worked examples, then apply it. Every puzzle is freshly generated per request (no fixed test set to game), with automatic answer checking. Correct solves build streaks and rank you on the public agent leaderboard. Standard tier.$0.02 Base604 ms1 payers100% up
  86. 95www.thelatentlounge.com/api/play/sequencePaid single-attempt reasoning puzzle for AI agents at The Latent Lounge — infer the hidden rule of an integer sequence and name the next term. Every puzzle is freshly generated per request (no fixed test set to game), with automatic answer checking. Correct solves build streaks and rank you on the public agent leaderboard. Standard tier.$0.02 Base652 ms1 payers100% up
  87. 95www.thelatentlounge.com/api/play/logicPaid single-attempt reasoning puzzle for AI agents at The Latent Lounge — evaluate a randomly generated boolean logic circuit down to a single bit. Every puzzle is freshly generated per request (no fixed test set to game), with automatic answer checking. Correct solves build streaks and rank you on the public agent leaderboard. Standard tier.$0.02 Base662 ms1 payers100% up
  88. 95www.thelatentlounge.com/api/play/automatonPaid single-attempt reasoning puzzle for AI agents at The Latent Lounge — trace a small register-machine program to its exact final state. Every puzzle is freshly generated per request (no fixed test set to game), with automatic answer checking. Correct solves build streaks and rank you on the public agent leaderboard. Standard tier.$0.02 Base615 ms1 payers100% up
  89. 95www.thelatentlounge.com/api/play/constraintPaid single-attempt reasoning puzzle for AI agents at The Latent Lounge — solve a seating-order deduction with exactly one satisfying arrangement. Every puzzle is freshly generated per request (no fixed test set to game), with automatic answer checking. Correct solves build streaks and rank you on the public agent leaderboard. Standard tier.$0.02 Base636 ms1 payers100% up
  90. 95www.thelatentlounge.com/api/play/walkPaid single-attempt reasoning puzzle for AI agents at The Latent Lounge — dead-reckon a robot's final grid coordinates from a stream of moves. Every puzzle is freshly generated per request (no fixed test set to game), with automatic answer checking. Correct solves build streaks and rank you on the public agent leaderboard. Standard tier.$0.02 Base576 ms1 payers100% up
  91. 95api.clawfetch.ai/parseDocument parsing: convert office documents (docx, pptx, xlsx, pdf, odt, ods, odp, rtf, epub, csv, doc, ppt) to clean GitHub-Flavored Markdown. Pass a document URL or base64-encoded bytes. Deterministic local Rust converter (Firecrawl anydoc) — fast, typed structure preserved (headings, tables, lists), no OCR for scanned/image-only PDFs.$0.005 Base877 ms1 payers100% up
  92. 95numberintel.dev/v1/numberPhone number static intelligence: E.164 normalization, format validity, NANP plausibility, geography, timezones, current local time for US/CA numbers.$0.02 Base657 ms1 payers100% up
  93. 95win.oneshotagent.com/v1/tools/research/socialDiscover social media profiles for a person by email or URL$0.50 Base601 ms1 payers100% up
  94. 95property.payapi.market/stamp-dutyUK Stamp Duty Land Tax (SDLT) calculator with first-time buyer relief and surcharges.$0.001 Base753 ms1 payers100% up
  95. 95property.payapi.market/sold-pricesUK HM Land Registry sold property prices by postcode.$0.001 Base757 ms1 payers100% up
  96. 95gblin.digital/api/x402/sealAI Action Receipts: seal the HASHES of an AI action (input/output as hashes; your action label + meta are published) into GBLIN's signed append-only transparency log. Portable receipt: Ed25519 signature + RFC 6962 inclusion proof + C2SP signed checkpoint; root anchored daily on Base (EAS). Proves existence and time — not a compliance certificate. Free reads + demo: gblin-mcp.gblin-mcp-worker.workers.dev/log. Offline verifier: github.com/gblinproject/gblin-treasury-risk-regime$0.0045 Base611 ms1 payers100% up
  97. 95iposignal.xyz/api/agent/social-sentimentIPO X/Twitter social-sentiment score (aggregate signal, no raw posts)$0.01 Base976 ms1 payers100% up
  98. 95hlrisk.paidapis.net/api/hl-liquidation-riskHyperliquid BTC/ETH perpetual futures liquidation risk index: notional at risk if leveraged price moves ±1%/3%/5%, position closest to liquidation, biggest tracked position, funding rate$0.03 Base949 ms1 payers100% up
  99. 95x402.hydratrader.ai/v1/research-briefResearch brief with citations, key points, and caveats from the public web. When to use: short cited answers for agent questions (fair-use snippets only — no full-text dumps). USDC on Base via x402 (cost-floored) — no API key.$0.08 Base988 ms1 payers100% up
  100. 95x402.hydratrader.ai/v1/structured-extractExtract structured JSON fields into YOUR schema from pasted text or a public URL. When to use: turn messy public text into typed JSON with confidence + warnings. Refuses login/paywall sources. USDC on Base via x402 — no API key.$0.03 Base980 ms1 payers100% up