x402watch

19,857 paid endpoints are listed. 19,030 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 2026-10-01 06:03 UTC · 19,857 probed

19,030 answering 402285 down414 rejecting128 no paywall2,412 price drift
  1. 100pulse.chainverdict.xyz/v1/rankingsx402 endpoint quality rankings: a ranked directory of x402 APIs by measured uptime and reliability rather than on-chain volume. Includes score, grade, latency and pricing per endpoint.$0.07 Base96 ms1 payers100% up
  2. 100chainverdict.xyz/v1/wallet/dossier/:addressWallet risk profile for a Base address before you pay it or accept payment from it: EOA or contract, first and last seen, transaction and counterparty counts, contract-verification status, and any flags raised. Behavioural signals only — they describe activity, not intent.$0.01 Base167 ms1 payers100% up
  3. 100chainverdict.xyz/v1/token/verdict/:addressToken safety check for an ERC-20 on Base: is this token a scam, a honeypot, or safe to hold? Examines ownership and mint authority, proxy upgradeability, liquidity and holder concentration, transfer-restriction patterns. Returns hold/caution/avoid with a score and the signals behind it. Heuristic static analysis, not a security audit — a proxy contract can change its implementation after this check.$0.01 Base155 ms1 payers100% up
  4. 100pro-api.coinmarketcap.com/x402/v4/dex/pairs/quotes/latestGet the latest quotes and trading data for specific DEX trading pairs.$0.01 Base204 ms1 payers100% up
  5. 100tensorfeed.ai/api/premium/funding/exposureDerived structural metrics over the AI funding portfolio. Silicon-vendor concentration shares per investor, circular-loop classification (fully-circular / partial-loop / agnostic), co-investor pairs holding the same recipient, top recipients by inbound capital. The "who is funding whose silicon" call.$0.10 Base282 ms1 payers100% up
  6. 100api.socialfetch.dev/v1/instagram/search/profilesSearch Instagram profiles by keyword.$0.014 Base293 ms1 payers100% up
  7. 100agents.daedalusdevelopmentgroup.com/v1/research/search-multiDDG agent-payable service request$0.01 Base136 ms1 payers100% up
  8. 100mpp.tracefast.xyz/api/v1/chains/1/tokens/:token/holdersTraceFast live Ethereum data: the largest current holders of a token contract. Up to 100 holders in descending balance order, balance in the token's smallest unit, plus holderCount — how many addresses hold a positive balance now. Path token: contract address, 0x-prefixed, 40 hex. Query limit: integer 1..100, default 100. Docs: https://docs.tracefast.xyz/api/token-holders.md$0.10 Base43 ms1 payers100% up
  9. 100agents.daedalusdevelopmentgroup.com/v1/mail/inboxDDG agent-payable service request$0.002 Base274 ms1 payers100% up
  10. 100agents.daedalusdevelopmentgroup.com/v1/mail/sendDDG agent-payable service request$0.005 Base276 ms1 payers100% up
  11. 100agents.daedalusdevelopmentgroup.com/v1/mail/keys/registerDDG agent-payable service request$0.001 Base294 ms1 payers100% up
  12. 100agents.daedalusdevelopmentgroup.com/v1/inbox/sendDDG agent-payable service request$0.004 Base117 ms1 payers100% up
  13. 100agents.daedalusdevelopmentgroup.com/v1/sla/declareDDG agent-payable service request$0.001 Base156 ms1 payers100% up
  14. 100api.socialfetch.dev/v1/tiktok/users/searchSearch TikTok users by keyword.$0.014 Base123 ms1 payers100% up
  15. 100soren.com/v1/ai/summarizeA faithful, information-dense summary of any text up to 24,000 characters, for agents holding a wallet but no LLM key. POST the text as the raw body; length=short (2-4 sentences, default) or medium. Temperature-zero, no invented facts, no preamble — and charged ONLY if the summary is produced. A failed inference costs nothing.$0.03 Base178 ms1 payers100% up
  16. 100soren.com/v1/ai/extractNamed fields pulled out of unstructured text as GUARANTEED-VALID JSON. POST the text as the raw body with fields=comma,separated,names (max 12). Every requested field is present in the answer — null when the text does not contain it — and the JSON is validated server-side BEFORE you are charged: no parse errors, no missing keys, ever. A failed inference costs nothing.$0.03 Base184 ms1 payers100% up
  17. 100agents.daedalusdevelopmentgroup.com/v1/security-audit/deepDDG agent-payable service request$0.25 Base260 ms1 payers100% up
  18. 100saylorinnovations.com/api/util/holidaysPublic holidays by country. Public holidays for 100+ countries: the full year list with regional scope, the next upcoming holiday, and whether today is a nationwide holiday.$0.001 Solana252 ms1 payers100% up
  19. 100saylorinnovations.com/api/evm/polygon/estimate-gasGas Estimate (polygon). Polygon gas estimate for a transaction (?to=, ?from=, ?data=, ?value=) with current gas price and estimated fee in the native coin; reverts reported cleanly.$0.002 Solana298 ms1 payers100% up
  20. 100saylorinnovations.com/api/evm/polygon/call/:addressRead-Only Contract Call (eth_call) (polygon). Polygon read-only contract call (eth_call) with ?data= calldata, optional ?from= and ?block=; reverts reported cleanly with revert data.$0.003 Solana261 ms1 payers100% up
  21. 100saylorinnovations.com/api/evm/optimism/estimate-gasGas Estimate (optimism). Optimism gas estimate for a transaction (?to=, ?from=, ?data=, ?value=) with current gas price and estimated fee in the native coin; reverts reported cleanly.$0.002 Solana260 ms1 payers100% up
  22. 100saylorinnovations.com/api/evm/optimism/call/:addressRead-Only Contract Call (eth_call) (optimism). Optimism read-only contract call (eth_call) with ?data= calldata, optional ?from= and ?block=; reverts reported cleanly with revert data.$0.003 Solana281 ms1 payers100% up
  23. 100saylorinnovations.com/api/evm/arbitrum/estimate-gasGas Estimate (arbitrum). Arbitrum gas estimate for a transaction (?to=, ?from=, ?data=, ?value=) with current gas price and estimated fee in the native coin; reverts reported cleanly.$0.002 Solana233 ms1 payers100% up
  24. 100saylorinnovations.com/api/evm/arbitrum/call/:addressRead-Only Contract Call (eth_call) (arbitrum). Arbitrum read-only contract call (eth_call) with ?data= calldata, optional ?from= and ?block=; reverts reported cleanly with revert data.$0.003 Solana221 ms1 payers100% up
  25. 100saylorinnovations.com/api/evm/ethereum/estimate-gasGas Estimate (ethereum). Ethereum gas estimate for a transaction (?to=, ?from=, ?data=, ?value=) with current gas price and estimated fee in the native coin; reverts reported cleanly.$0.002 Solana230 ms1 payers100% up
  26. 100saylorinnovations.com/api/evm/ethereum/call/:addressRead-Only Contract Call (eth_call) (ethereum). Ethereum read-only contract call (eth_call) with ?data= calldata, optional ?from= and ?block=; reverts reported cleanly with revert data.$0.003 Solana199 ms1 payers100% up
  27. 100saylorinnovations.com/api/evm/base/estimate-gasGas Estimate (base). Base gas estimate for a transaction (?to=, ?from=, ?data=, ?value=) with current gas price and estimated fee in the native coin; reverts reported cleanly.$0.002 Solana190 ms1 payers100% up
  28. 100saylorinnovations.com/api/evm/base/call/:addressRead-Only Contract Call (eth_call) (base). Base read-only contract call (eth_call) with ?data= calldata, optional ?from= and ?block=; reverts reported cleanly with revert data.$0.003 Solana167 ms1 payers100% up
  29. 100saylorinnovations.com/api/mcp-scanMCP Server Security Scan (tool poisoning, prompt injection, risky capabilities). MCP server security scan and trust check before connecting: connects as an MCP client (initialize, tools/list, prompts/list, resources/list) and checks every tool for tool poisoning and prompt injection (hidden <IMPORTANT> instructions, requests to read ~/.ssh or config files, do-not-tell-the-user language, exfiltration), invisible Unicode and data-smuggling parameters; flags risky capabilities (code execution…$0.01 Solana248 ms1 payers100% up
  30. 100api.interzoid.com/getipprofileGet comprehensive profile information for an IP address including geolocation, ISP, organization, connection type, CIDR block, and reputation assessment.$0.25 Base253 ms1 payers100% up
  31. 100api.interzoid.com/getxuserprofileRetrieve a comprehensive profile snapshot for an X (Twitter) handle including display name, bio description, follower and following counts, total post count, website URL, location, and account creation date.$0.05 Base266 ms1 payers100% up
  32. 100jtifhcvbgxqwlywugvjv.supabase.co/functions/v1/cortex402-mortgage-ratesLive US mortgage and macro rate snapshot. Returns 30-year and 15-year fixed mortgage rates, the prime rate, the fed funds rate, and CPI year-over-year, each with its as-of date.$0.02 Base269 ms1 payers100% up
  33. 100soren.com/v1/chain/supplyRead an ERC-20 total supply with symbol, decimals and a formatted amount, live from Base mainnet, for a fraction of a cent. No API key, no account — a wallet is the only requirement, and you are charged only if the read succeeds. Plain unsigned data; the attested version of chain reads is /v1/oracle/onchain. Answers are read at the moment of the call and stamped with the block they came from where applicable.$0.003 Base77 ms1 payers100% up
  34. 100saylorinnovations.com/api/medical/trialsClinical Trial Search (ClinicalTrials.gov). Clinical trial search on ClinicalTrials.gov by condition, drug/sponsor/NCT id, location, status and phase: title, phases, sponsor, interventions, enrollment, dates, eligibility and matching trial sites (facility, city, country).$0.002 Solana265 ms1 payers100% up
  35. 100saylorinnovations.com/api/vuln/checkPackage Vulnerability Check (OSV). Package vulnerability check before you install or ship a dependency: known vulnerabilities for a specific version from OSV.dev (GitHub advisories, PyPA, RustSec, Go, npm...) with CVE aliases, severity, fixed-in versions and the recommended upgrade. npm, PyPI, crates, Go, Maven, NuGet, RubyGems, Packagist, Pub, Hex.$0.002 Solana273 ms1 payers100% up
  36. 100saylorinnovations.com/api/util/vatEU VAT number validation (VIES). EU VAT number validation via the European Commission VIES service: valid or not, registered business name and address where the member state discloses it, for all 27 EU states plus Northern Ireland (XI). Checked before payment — if a national database is offline you are not charged.$0.002 Solana260 ms1 payers100% up
  37. 100modelprices.xyz/jamba-pricingJamba pricing table: what every Jamba model costs per token right now — Jamba 1.5 Large, Jamba Mini — from AI21 and every provider that resells or hosts them (Bedrock, Azure, Vertex, OpenRouter, Fireworks). Input, output, cache and batch USD per 1M tokens, sorted cheapest first, so you can compare Jamba inference cost across hosts and pick the cheapest place to run one. Normalized, cross-checked, refreshed hourly.$0.01 Base181 ms1 payers100% up
  38. 100modelprices.xyz/glm-pricingGLM pricing table: what every GLM model costs per token right now — GLM-4.6, GLM-4.5 Air — from Zhipu AI and every provider that resells or hosts them (Bedrock, Azure, Vertex, OpenRouter, Fireworks). Input, output, cache and batch USD per 1M tokens, sorted cheapest first, so you can compare GLM inference cost across hosts and pick the cheapest place to run one. Normalized, cross-checked, refreshed hourly.$0.01 Base149 ms1 payers100% up
  39. 100modelprices.xyz/gemma-pricingGemma pricing table: what every Gemma model costs per token right now — Gemma 3, Gemma 2 — from Google and every provider that resells or hosts them (Bedrock, Azure, Vertex, OpenRouter, Fireworks). Input, output, cache and batch USD per 1M tokens, sorted cheapest first, so you can compare Gemma inference cost across hosts and pick the cheapest place to run one. Normalized, cross-checked, refreshed hourly.$0.01 Base149 ms1 payers100% up
  40. 100modelprices.xyz/gemini-pricingGemini pricing table: what every Gemini model costs per token right now — Gemini 3 Pro, Gemini 3 Flash, Gemini 2.5 — from Google and every provider that resells or hosts them (Bedrock, Azure, Vertex, OpenRouter, Fireworks). Input, output, cache and batch USD per 1M tokens, sorted cheapest first, so you can compare Gemini inference cost across hosts and pick the cheapest place to run one. Normalized, cross-checked, refreshed hourly.$0.01 Base172 ms1 payers100% up
  41. 100modelprices.xyz/deepseek-pricingDeepSeek pricing table: what every DeepSeek model costs per token right now — DeepSeek V4, DeepSeek R1, DeepSeek Coder — from DeepSeek and every provider that resells or hosts them (Bedrock, Azure, Vertex, OpenRouter, Fireworks). Input, output, cache and batch USD per 1M tokens, sorted cheapest first, so you can compare DeepSeek inference cost across hosts and pick the cheapest place to run one. Normalized, cross-checked, refreshed hourly.$0.01 Base157 ms1 payers100% up
  42. 100modelprices.xyz/command-pricingCommand pricing table: what every Command model costs per token right now — Command A, Command R+, Command R — from Cohere and every provider that resells or hosts them (Bedrock, Azure, Vertex, OpenRouter, Fireworks). Input, output, cache and batch USD per 1M tokens, sorted cheapest first, so you can compare Command inference cost across hosts and pick the cheapest place to run one. Normalized, cross-checked, refreshed hourly.$0.01 Base150 ms1 payers100% up
  43. 100modelprices.xyz/claude-pricingClaude pricing table: what every Claude model costs per token right now — Claude 5, Claude Opus, Claude Sonnet, Claude Haiku — from Anthropic and every provider that resells or hosts them (Bedrock, Azure, Vertex, OpenRouter, Fireworks). Input, output, cache and batch USD per 1M tokens, sorted cheapest first, so you can compare Claude inference cost across hosts and pick the cheapest place to run one. Normalized, cross-checked, refreshed hourly.$0.01 Base140 ms1 payers100% up
  44. 100modelprices.xyz/llm/limitsAI model capability, specs and limits table for 2,000+ LLMs — GPT-5, GPT-4o, Claude 5, Claude Sonnet, Gemini 3 Pro, Llama 4, DeepSeek V4 and more: context window size, max output tokens, vision/audio/function-calling/reasoning support. Compare model constraints side-by-side across every provider to pick the right model for long-context, multimodal, or tool-use workloads. Refreshed hourly.$0.02 Base154 ms1 payers100% up
  45. 100saylorinnovations.com/api/aircraft/nearLive Aircraft Near a Location (worldwide ADS-B). Live aircraft near any point or airport worldwide (ADS-B/MLAT): callsign, registration, type, position, altitude, speed, heading, climb rate, squawk and emergency flags, distance — nearest first.$0.002 Solana206 ms1 payers100% up
  46. 100saylorinnovations.com/api/species/lookupSpecies Lookup: taxonomy, common names, IUCN status, range (GBIF). Species lookup by scientific or common name (GBIF): accepted name, full taxonomy, common names, IUCN Red List status, occurrence record count and top countries.$0.001 Solana172 ms1 payers100% up
  47. 100saylorinnovations.com/api/genetics/conditionGenetic Condition Reference (MedlinePlus Genetics). Genetic condition reference from MedlinePlus Genetics (NLM): description, frequency, genetic causes, inheritance pattern, related genes, synonyms and identifiers.$0.001 Solana170 ms1 payers100% up
  48. 100saylorinnovations.com/api/dnd/searchD&D 5e SRD Search. Search the D&D 5e SRD across spells, monsters, magic items, equipment, classes, races and conditions.$0.001 Solana167 ms1 payers100% up
  49. 100saylorinnovations.com/api/sky/planetsPlanets Visible Tonight (times, altitude, direction). Which planets are visible tonight from any location: best viewing time, maximum altitude, compass direction, hours above 10 degrees and elongation from the Sun.$0.001 Solana138 ms1 payers100% up
  50. 100saylorinnovations.com/api/aurora/forecastAurora Forecast for a Location (NOAA SWPC). Aurora (northern/southern lights) chance at any location from NOAA OVATION, current Kp index, 3-day Kp forecast and whether a geomagnetic storm is expected.$0.001 Solana193 ms1 payers100% up
  51. 100saylorinnovations.com/api/border/wait-timesU.S. Land Border Wait Times (CBP). Live U.S. land border wait times (CBP) for Mexican and Canadian crossings: passenger, SENTRI/NEXUS, Ready, pedestrian and commercial lane delays and lanes open.$0.001 Solana137 ms1 payers100% up
  52. 100saylorinnovations.com/api/avalanche/forecastAvalanche Danger Ratings (U.S. forecast zones). Avalanche danger ratings (1 low to 5 extreme) for U.S. forecast zones by point or state, with travel advice, validity and forecast links from the regional avalanche centers.$0.001 Solana159 ms1 payers100% up
  53. 100saylorinnovations.com/api/color/contrastWCAG Color Contrast Checker. WCAG 2.x contrast ratio between two colors with pass/fail for AA and AAA normal and large text and UI components.$0.001 Solana149 ms1 payers100% up
  54. 100saylorinnovations.com/api/useragent/parseUser-Agent Parser: browser, OS, device, bot detection (incl. AI crawlers). Parse a user-agent string: browser and version, OS and version, device type, rendering engine, and bot detection including AI crawlers (GPTBot, ClaudeBot, PerplexityBot, CCBot...).$0.001 Solana151 ms1 payers100% up
  55. 100saylorinnovations.com/api/sun/timesSunrise, Sunset, Twilight & Moon Phase for Any Place/Date. Sunrise, sunset, solar noon, day length and civil/nautical/astronomical twilight for any coordinates and date (polar day/night handled), plus moon phase, illumination and next full/new moon.$0.001 Solana151 ms1 payers100% up
  56. 100saylorinnovations.com/api/breach/passwordPassword Breach Check by SHA-1 (Have I Been Pwned). Check whether a password appears in known data breaches by its SHA-1 hash (the password itself is never sent), with how many times it has been seen. Have I Been Pwned k-anonymity range API.$0.001 Solana150 ms1 payers100% up
  57. 100saylorinnovations.com/api/docker/imageDocker Hub Image Info: pulls, stars, latest tags & architectures. Docker Hub repository info: description, official flag, stars, total pulls, last update, and the latest tags with sizes, digests and supported architectures.$0.001 Solana152 ms1 payers100% up
  58. 100saylorinnovations.com/api/breweries/searchBrewery Finder (Open Brewery DB). Brewery finder by name, city, state or type (micro, brewpub, regional...): address, phone, website and coordinates. Data from Open Brewery DB.$0.001 Solana138 ms1 payers100% up
  59. 100saylorinnovations.com/api/music/artistMusic Artist Lookup: discography, genres, origin (MusicBrainz). Music artist lookup from MusicBrainz: type, origin country, active years, genres, full album and EP discography with release dates, and similarly named artists.$0.001 Solana151 ms1 payers100% up
  60. 100saylorinnovations.com/api/lobbying/filingsU.S. Lobbying Disclosures (who lobbies, for whom, on what). U.S. federal lobbying disclosures by client, lobbying firm or issue: amounts reported, filing period, issue areas and descriptions, lobbyists and the government bodies lobbied, with the filing document link.$0.002 Solana228 ms1 payers100% up
  61. 100saylorinnovations.com/api/tv/scheduleTV Schedule by Country & Date (TVmaze). TV broadcast schedule for any country and date: every airing with time, show, network, episode and genres; optional prime-time filter. Data from TVmaze.$0.001 Solana193 ms1 payers100% up
  62. 100saylorinnovations.com/api/tv/searchTV Show Search + Next Episode (TVmaze). TV show search: network or streamer, status, genres, schedule, rating, runtime, IMDb link, summary, and the next and previous episode with air dates. Data from TVmaze.$0.001 Solana170 ms1 payers100% up
  63. 100saylorinnovations.com/api/aviation/airport-statusU.S. Airport Delays & Ground Stops (FAA). Live FAA status for U.S. airports: ground stops, ground delay programs with average and maximum delay, arrival/departure delays with trend, and closures; one airport or every current event.$0.001 Solana160 ms1 payers100% up
  64. 100saylorinnovations.com/api/weather/alertsU.S. Severe Weather Alerts (NWS warnings, watches, advisories). Active U.S. National Weather Service alerts for a state or a point: warnings, watches and advisories (flash flood, tornado, heat, winter storm...) with severity, urgency, affected areas, timing and instructions.$0.001 Solana166 ms1 payers100% up
  65. 100saylorinnovations.com/api/lottery/checkCheck Lottery Ticket Numbers Against a Draw. Check a lottery ticket against a Powerball, Mega Millions, NY Lotto or Take 5 draw: matched numbers, special-ball match and the base prize tier.$0.001 Solana170 ms1 payers100% up
  66. 100saylorinnovations.com/api/lottery/resultsLottery Winning Numbers (Powerball, Mega Millions, NY Lotto, Take 5). Latest or dated winning numbers for Powerball, Mega Millions, NY Lotto and Take 5, with special balls and multipliers.$0.001 Solana204 ms1 payers100% up
  67. 100saylorinnovations.com/api/apps/searchApp Store Search (iOS / Mac apps). Apple App Store search for iOS/Mac apps: developer, price, rating and rating count, genre, version, last update, size, age rating and store link, for any country store.$0.002 Solana183 ms1 payers100% up
  68. 100saylorinnovations.com/api/medical/interactionsDrug Interaction Check from FDA Label Text. Check 2-5 drugs against each other using FDA label text: finds where one drug label names another drug, its ingredients, brands or drug class (SSRI, NSAID, statin...) in interaction, warning or contraindication sections, with excerpts. Reference only, not medical advice.$0.003 Solana144 ms1 payers100% up
  69. 100saylorinnovations.com/api/medical/npiU.S. Healthcare Provider Lookup (NPI Registry). U.S. healthcare provider lookup in the CMS NPI Registry by NPI number, name, organization, state, city or specialty: credential, specialty, license, status, practice address and phone.$0.002 Solana169 ms1 payers100% up
  70. 100saylorinnovations.com/api/medical/loincLOINC Lab Test Code Search. LOINC laboratory test code search: codes and names, deprecated codes flagged (NLM Clinical Tables).$0.001 Solana139 ms1 payers100% up
  71. 100saylorinnovations.com/api/medical/icd10ICD-10-CM Diagnosis Code Search. ICD-10-CM diagnosis code search by condition text or code: codes with official descriptions and billable flag (NLM Clinical Tables).$0.001 Solana151 ms1 payers100% up
  72. 100saylorinnovations.com/api/vuln/kevActively Exploited Vulnerabilities (CISA KEV + EPSS). What attackers are exploiting now: CISA Known Exploited Vulnerabilities added in the last N days, filterable by vendor, text and known ransomware use, each with EPSS exploit probability, due date and required action, plus top vendors.$0.002 Solana134 ms1 payers100% up
  73. 100saylorinnovations.com/api/vuln/cveCVE Intelligence: CVSS, EPSS, CISA KEV, Fixes. Everything about one CVE in a single call: description, CVSS (CNA, CISA ADP or NVD), CWEs, CISA Known Exploited status with due date and ransomware use, FIRST EPSS 30-day exploit probability, affected products, package fixed-in versions (OSV/GHSA) and a patch priority.$0.002 Solana170 ms1 payers100% up
  74. 100saylorinnovations.com/api/util/timeTime zones — now anywhere, or DST-aware conversion. Time zones: current time in any IANA zone, or convert a local time between zones, daylight-saving aware, with UTC offset, abbreviation and weekday.$0.001 Solana125 ms1 payers100% up
  75. 100saylorinnovations.com/api/web/readRead a Web Page as Clean Markdown. Web page to markdown: read any public URL as clean markdown for an agent — fetches the page (redirects followed), extracts the main article content, drops navigation, footers, cookie banners and link farms, and keeps headings, lists, links, code, tables and images, with title, author, publish date, language and canonical URL. ?max_chars= up to 100000, ?links=true for page links. Private addresses, error pages and non-HTML files are refused before payment.$0.005 Solana167 ms1 payers100% up
  76. 100saylorinnovations.com/api/predictions/searchPrediction Market Search (Polymarket + Kalshi). Polymarket and Kalshi odds search: find prediction markets by keyword and get implied probabilities (0-1) per outcome, best bid/ask, last trade, 24h volume, liquidity and close time in one normalized format, ranked by trading activity.$0.003 Solana254 ms1 payers100% up
  77. 100api.myceliasignal.com/oracle/volatility/eth/usdMSVI Ethereum volatility index — composite of realized vol, implied vol, term structure, funding stress and put/call ratio — Ed25519 signed attestation$0.05 Base119 ms1 payers100% up
  78. 100api.myceliasignal.com/oracle/sentiment/btc/usdMSXI Bitcoin market sentiment index — funding rate, 25-delta skew, put/call ratio, futures term structure and cross-exchange basis dispersion, each weighted and reported separately — Ed25519 signed attestation$0.05 Base226 ms1 payers100% up
  79. 100x402-tools-production-2755.up.railway.app/tools/gasUse before sending an EVM transaction to pick the cheapest chain and set its fees. Live gas on Ethereum, Base, Arbitrum, Optimism, Polygon and BSC: slow/standard/fast EIP-1559 fee tiers (priority fee, maxFee) from recent blocks, plus the USD cost of a transfer, ERC-20 transfer and swap per tier, cheapest chain first.$0.002 Base102 ms1 payers100% up
  80. 100x402-tools-production-2755.up.railway.app/tools/walletResolve an address or ENS name and return ETH and USDC balances and tx counts on Ethereum and Base.$0.002 Base107 ms1 payers100% up
  81. 100clink-lithium-vault.fly.dev/llm/chatClaude API for AI agents, pay per token, no API key or account - POST an Anthropic Messages request (messages, system, tools, tool_choice, thinking) and get the full response back. Claude Opus 5, Sonnet 5, Haiku 4.5. Tool calling / function calling supported. Billed on actual usage at list price + 25%, capped at $0.25 per call (x402 upto scheme). LLM inference, chat completions, keyless Claude, Anthropic proxy. Free price sheet: /llm/models.$0.25 Base291 ms1 payers100% up
  82. 100clink-lithium-vault.fly.dev/pdf/answerAsk a question about any public PDF and get a cited answer - pass a PDF URL and a plain-language question; returns the answer, confidence, verbatim supporting quotes with page numbers, or not_found. PDF question answering, document QA, read a filing/paper/manual/contract for me, extract a fact from a PDF. Text-based PDFs up to 25MB (no OCR). Full text instead: /pdf/text $0.01.$0.05 Base273 ms1 payers100% up
  83. 100api.glianalabs.com/x402/tts-1.5-maxGlianaAI - pay-per-call AI: LLM chat (OpenAI-compatible), image, video, music, speech - 90+ models, no signup, USDC. This resource: tts-1.5-max (Text-to-Speech). https://ai.glianalabs.com$0.0315 Base19 ms1 payers100% up
  84. 100x402-datashop-production.up.railway.app/v1/wx/forecastHourly weather forecast for any point on Earth from Open-Meteo (blend of ECMWF/GFS/ICON models, refreshed hourly; data CC-BY 4.0). Query: ?latitude=48.8566&longitude=2.3522&hourly=temperature_2m,precipitation,wind_speed_10m&forecast_days=2 (1-16 days, ~80 hourly variables available, optional daily= aggregates and timezone=auto). ISO 8601 time arrays + units. 15 min cache.$0.001 Base180 ms1 payers100% up
  85. 100saylorinnovations.com/api/web/historyWebsite History (Internet Archive). Website history from the Internet Archive: first and last snapshot, years archived, distinct versions per year and the most recent content changes with archive links. Answers what changed on a website and how long it has existed.$0.003 Solana126 ms1 payers100% up
  86. 100x402-tools-production-2755.up.railway.app/tools/hackernewsUse to find what developers and the tech industry are discussing about a topic, or to get today's top tech stories. Full-text Hacker News search (or the front page when no query), filterable by age, points and story type, up to 50 stories with points, comment counts and links. Not charged if nothing matches.$0.002 Base99 ms1 payers100% up
  87. 100x402-tools-production-2755.up.railway.app/tools/domainUse to vet a domain or URL before trusting it, or to check if a name is available. Registry RDAP data (the WHOIS successor) for up to 20 domains per call: registrar, created/expiry dates, age in days, status and transfer lock, nameservers, DNSSEC. Subdomains resolve to their registered domain. One flat price per call.$0.002 Base99 ms1 payers100% up
  88. 100x402-tools-production-2755.up.railway.app/tools/dex-priceUse to price tokens by contract address, including long-tail tokens with no CoinGecko listing. Live DEX price, 24h change, volume, liquidity and market cap for up to 30 tokens per call on ethereum, base, arbitrum, optimism, polygon, bsc, avalanche, solana. One flat price per call; not charged if no address has a price.$0.002 Base111 ms1 payers100% up
  89. 100clink-lithium-vault.fly.dev/vault/spodumene-historyHistorical spodumene prices - the full DAILY SC6 spodumene concentrate (6% Li2O, CIF China) price series from May 2023 to today, USD/tonne, ~750 prints, PLUS daily lithium carbonate spot and quarterly producer realized prices cited to SEC/ASX filings (Pilbara, Sigma, Kodal). One call = the whole time series. ?interval=daily|weekly|monthly&from=&to= (all optional). Lithium price history, spodumene price chart data, battery metals. Latest print only: /vault/summary $0.02.$0.05 Base90 ms1 payers100% up
  90. 100clink-lithium-vault.fly.dev/vault/verdictLithium company or mine, one cited plain-language read: cost-curve position vs the tracked universe, balance-sheet survival rank, permitting/development stage, key risks and strengths, data gaps - facts from SEC/ASX/TSX filings, no investment advice. Lithium mining research, battery metals due diligence, spodumene/brine producers. ?entity=<TICKER|MineName>&level=<company|mine>. Underlying data: /vault/summary $0.02, /vault/comparables $0.20.$0.05 Base88 ms1 payers100% up
  91. 100clink-lithium-vault.fly.dev/vault/comparablesLithium Research Vault - cost-curve & peer ranking for any lithium company or mine vs the tracked universe of 66 mines, 44 operators: AISC percentile, resource-size rank, balance-sheet survival rank. Dataset-level analysis - who survives the downcycle - that a single-entity call can't give. Spodumene/brine producers + developers, every figure cited to SEC/ASX/TSX filings. Greenbushes, Pilgangoora, Atacama, Cinovec; tickers SGML, ALB, PILBF, SQM. /vault/summary $0.02, /vault $0.05.$0.20 Base125 ms1 payers100% up
  92. 100clink-lithium-vault.fly.dev/vaultLithium Research Vault - full structured JSON for any lithium / battery-metals producer or DFS-stage developer, by company or mine: production, AISC, reserves, ownership, royalties, offtakes, financials, DFS economics (NPV/IRR/capex), market cap & lithium spot. From SEC/ASX/TSX/cninfo filings, USD-normalized, every figure cited. 66 mines, 44 operators. Greenbushes, Pilgangoora, Wodgina, Cinovec; tickers SGML, ALB, PILBF, EMH, GL1, PMETF. /vault/summary $0.02; /vault/comparables $0.20.$0.05 Base199 ms1 payers100% up
  93. 100clink-lithium-vault.fly.dev/vault/summaryLithium Research Vault - headline snapshot for any lithium & battery-metals company, producing mine, or DFS-stage developer. One row: latest production, AISC, cash/debt/EBITDA, reserves, DFS NPV/IRR, top holder, source filing. Albemarle, Pilbara, SQM, Greenbushes, Atacama, Cinovec, Manna, Bandeira. 66 lithium mines (43 producing + 23 developer), 44 operators. Query by ticker (ALB, SQM, SGML, EMH, GL1, PMETF) or mine name. Cheapest tier; /vault full rows, /vault/comparables ranking.$0.02 Base190 ms1 payers100% up
  94. 100clink-lithium-vault.fly.dev/market/pulseAgent economy market report - what AI agents actually pay for. Daily snapshots of the ENTIRE x402 bazaar + MCP registry: total revenue and payers with week-over-week change, top gaining and losing services, new launches that already have paying customers, delisted services, revenue by price band. x402 analytics, API marketplace stats, agentic commerce data, competitor tracking for agent tool sellers. ?days=7 (1-60). Free sample: /market/example.$0.005 Base189 ms1 payers100% up
  95. 100clink-lithium-vault.fly.dev/x/usersX/Twitter account search for AI agents - find accounts by name, topic or keyword, no API key or login. Up to 20 matching profiles with handle, display name, bio, follower and following counts, verified status, location and URL. Build a list of analysts in a niche, find a company's real account, or discover creators to monitor. ?query=lithium analyst. One profile: /x/profile $0.02.$0.02 Base177 ms1 payers100% up
  96. 100clink-lithium-vault.fly.dev/x/repliesX/Twitter replies for AI agents - the reply thread under any post, by tweet id, no API key or login. Up to 20 replies with author, follower count, text, timestamp, likes, retweets, views and URL. Read the reaction to an announcement, gauge community sentiment on a launch, or mine a viral thread for arguments. ?id=1234567890. The tweet itself: /x/tweet $0.01. AI summary: /x/digest $0.05.$0.02 Base176 ms1 payers100% up
  97. 100clink-lithium-vault.fly.dev/x/userX/Twitter user timeline for AI agents - the latest tweets from any handle, no Twitter API key or login. Up to 20 newest posts with text, date, likes, retweets, replies, views, follower count and URL, plus the pinned tweet. Track founders, analysts, competitors, crypto callers, journalists, brands. ?username=elonmusk. Search all of X instead: /x/search $0.02. AI trend summary: /x/digest $0.05.$0.02 Base163 ms1 payers100% up
  98. 100clink-lithium-vault.fly.dev/x/watchMonitor X/Twitter for changes - pass a search query and (optionally) a cursor from your last check, get back ONLY what's new since then, plus an AI change summary. Cursor-based so an agent never re-reads the same tweets. Brand monitoring, keyword alerts, competitor tracking. ?query=<advanced search>&since=<ISO timestamp or tweet id>. First call (no since) returns a baseline of the latest 20 + a cursor to pass next time.$0.05 Base168 ms1 payers100% up
  99. 100clink-lithium-vault.fly.dev/x/account-verdictIs this X/Twitter account real? Bot check + verdict for AI agents - pass a handle, get an AI read (real_person/organization/likely_bot/parody_or_fan/inactive/unclear) with confidence, known-for, recent themes, red flags, plus non-LLM stats: account age, posts/week, avg likes/views, reply share. Influencer vetting, KOL check, lead qualification, verify an account before trusting it. ?username=elonmusk.$0.02 Base172 ms1 payers100% up
  100. 100clink-lithium-vault.fly.dev/x/pain-pointsVoice-of-customer / product complaints digest for AI agents - pass a product or brand, get clustered pain points, feature requests and praise mined from live X posts, with verbatim quotes and URLs. Product research, competitor research, churn signals, roadmap input. ?product=<name or handle>. Raw tweets + trend summary instead: /x/digest $0.05.$0.05 Base156 ms1 payers100% up