x402watch

19,733 paid endpoints are listed. 18,910 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 2026-09-30 22:23 UTC · 19,733 probed

18,910 answering 402263 down434 rejecting126 no paywall2,380 price drift
  1. 100market.datapackvibe.com/x402/json-inspect-surveySurvey JSON structure inspector: Parse JSON and report its root type, keys, and item count. Tailored for survey workflows.$0.01 Base155 ms1 payers100% up
  2. 100market.datapackvibe.com/x402/json-inspect-crmCRM JSON structure inspector: Parse JSON and report its root type, keys, and item count. Tailored for crm workflows.$0.01 Base151 ms1 payers100% up
  3. 100market.datapackvibe.com/x402/faq-pairs-workplaceWorkplace FAQ formatter: Format supplied question and answer pairs as structured FAQ entries. Tailored for workplace workflows.$0.01 Base155 ms1 payers100% up
  4. 100market.datapackvibe.com/x402/faq-pairs-nonprofitNonprofit FAQ formatter: Format supplied question and answer pairs as structured FAQ entries. Tailored for nonprofit workflows.$0.01 Base158 ms1 payers100% up
  5. 100market.datapackvibe.com/x402/faq-pairs-recruitingRecruiting FAQ formatter: Format supplied question and answer pairs as structured FAQ entries. Tailored for recruiting workflows.$0.01 Base168 ms1 payers100% up
  6. 100market.datapackvibe.com/x402/faq-pairs-customer-supportCustomer support FAQ formatter: Format supplied question and answer pairs as structured FAQ entries. Tailored for customer support workflows.$0.01 Base153 ms1 payers100% up
  7. 100market.datapackvibe.com/x402/faq-pairs-ecommerceEcommerce FAQ formatter: Format supplied question and answer pairs as structured FAQ entries. Tailored for ecommerce workflows.$0.01 Base154 ms1 payers100% up
  8. 100market.datapackvibe.com/x402/email-draft-workplaceWorkplace Email draft builder: Draft a short email from a purpose, audience, key points, and tone. Tailored for workplace workflows.$0.01 Base163 ms1 payers100% up
  9. 100market.datapackvibe.com/x402/email-draft-nonprofitNonprofit Email draft builder: Draft a short email from a purpose, audience, key points, and tone. Tailored for nonprofit workflows.$0.01 Base154 ms1 payers100% up
  10. 100market.datapackvibe.com/x402/email-draft-recruitingRecruiting Email draft builder: Draft a short email from a purpose, audience, key points, and tone. Tailored for recruiting workflows.$0.01 Base151 ms1 payers100% up
  11. 100market.datapackvibe.com/x402/email-draft-ecommerceEcommerce Email draft builder: Draft a short email from a purpose, audience, key points, and tone. Tailored for ecommerce workflows.$0.01 Base152 ms1 payers100% up
  12. 100market.datapackvibe.com/x402/redact-emails-workplaceWorkplace Email redactor: Replace email addresses in supplied text with a privacy marker. Tailored for workplace workflows.$0.01 Base157 ms1 payers100% up
  13. 100market.datapackvibe.com/x402/redact-emails-nonprofitNonprofit Email redactor: Replace email addresses in supplied text with a privacy marker. Tailored for nonprofit workflows.$0.01 Base155 ms1 payers100% up
  14. 100market.datapackvibe.com/x402/redact-emails-recruitingRecruiting Email redactor: Replace email addresses in supplied text with a privacy marker. Tailored for recruiting workflows.$0.01 Base162 ms1 payers100% up
  15. 100market.datapackvibe.com/x402/redact-emails-customer-supportCustomer support Email redactor: Replace email addresses in supplied text with a privacy marker. Tailored for customer support workflows.$0.01 Base159 ms1 payers100% up
  16. 100market.datapackvibe.com/x402/redact-emails-ecommerceEcommerce Email redactor: Replace email addresses in supplied text with a privacy marker. Tailored for ecommerce workflows.$0.01 Base152 ms1 payers100% up
  17. 100market.datapackvibe.com/x402/extract-urls-workplaceWorkplace URL extractor: Extract unique HTTP and HTTPS links from supplied text. Tailored for workplace workflows.$0.01 Base151 ms1 payers100% up
  18. 100market.datapackvibe.com/x402/extract-urls-nonprofitNonprofit URL extractor: Extract unique HTTP and HTTPS links from supplied text. Tailored for nonprofit workflows.$0.01 Base164 ms1 payers100% up
  19. 100market.datapackvibe.com/x402/extract-urls-recruitingRecruiting URL extractor: Extract unique HTTP and HTTPS links from supplied text. Tailored for recruiting workflows.$0.01 Base157 ms1 payers100% up
  20. 100market.datapackvibe.com/x402/extract-urls-customer-supportCustomer support URL extractor: Extract unique HTTP and HTTPS links from supplied text. Tailored for customer support workflows.$0.01 Base150 ms1 payers100% up
  21. 100market.datapackvibe.com/x402/extract-urls-ecommerceEcommerce URL extractor: Extract unique HTTP and HTTPS links from supplied text. Tailored for ecommerce workflows.$0.01 Base152 ms1 payers100% up
  22. 100market.datapackvibe.com/x402/dedupe-lines-workplaceWorkplace Duplicate-line remover: Remove repeated and blank lines while preserving order. Tailored for workplace workflows.$0.01 Base160 ms1 payers100% up
  23. 100market.datapackvibe.com/x402/dedupe-lines-nonprofitNonprofit Duplicate-line remover: Remove repeated and blank lines while preserving order. Tailored for nonprofit workflows.$0.01 Base159 ms1 payers100% up
  24. 100market.datapackvibe.com/x402/dedupe-lines-ecommerceEcommerce Duplicate-line remover: Remove repeated and blank lines while preserving order. Tailored for ecommerce workflows.$0.01 Base150 ms1 payers100% up
  25. 100market.datapackvibe.com/x402/excerpt-workplaceWorkplace Text excerpt maker: Create a short excerpt within a requested character limit. Tailored for workplace workflows.$0.01 Base160 ms1 payers100% up
  26. 100market.datapackvibe.com/x402/excerpt-nonprofitNonprofit Text excerpt maker: Create a short excerpt within a requested character limit. Tailored for nonprofit workflows.$0.01 Base155 ms1 payers100% up
  27. 100market.datapackvibe.com/x402/excerpt-recruitingRecruiting Text excerpt maker: Create a short excerpt within a requested character limit. Tailored for recruiting workflows.$0.01 Base159 ms1 payers100% up
  28. 100market.datapackvibe.com/x402/excerpt-ecommerceEcommerce Text excerpt maker: Create a short excerpt within a requested character limit. Tailored for ecommerce workflows.$0.01 Base159 ms1 payers100% up
  29. 100market.datapackvibe.com/x402/slug-workplaceWorkplace URL-safe slug maker: Convert a title into a lowercase URL slug. Tailored for workplace workflows.$0.01 Base153 ms1 payers100% up
  30. 100market.datapackvibe.com/x402/slug-nonprofitNonprofit URL-safe slug maker: Convert a title into a lowercase URL slug. Tailored for nonprofit workflows.$0.01 Base166 ms1 payers100% up
  31. 100market.datapackvibe.com/x402/slug-recruitingRecruiting URL-safe slug maker: Convert a title into a lowercase URL slug. Tailored for recruiting workflows.$0.01 Base161 ms1 payers100% up
  32. 100market.datapackvibe.com/x402/slug-ecommerceEcommerce URL-safe slug maker: Convert a title into a lowercase URL slug. Tailored for ecommerce workflows.$0.01 Base168 ms1 payers100% up
  33. 100market.datapackvibe.com/x402/reading-time-workplaceWorkplace Reading time estimator: Estimate reading time at 200 words per minute. Tailored for workplace workflows.$0.01 Base157 ms1 payers100% up
  34. 100market.datapackvibe.com/x402/reading-time-nonprofitNonprofit Reading time estimator: Estimate reading time at 200 words per minute. Tailored for nonprofit workflows.$0.01 Base158 ms1 payers100% up
  35. 100market.datapackvibe.com/x402/reading-time-ecommerceEcommerce Reading time estimator: Estimate reading time at 200 words per minute. Tailored for ecommerce workflows.$0.01 Base160 ms1 payers100% up
  36. 100api.magentlab.com/api/codes/searchMap a natural-language drug, diagnosis, or lab phrase to a current RxNorm, ICD-10-CM, or LOINC code. Use when an agent must not hallucinate or invent a billing/pharmacy code.$0.005 Base251 ms1 payers100% up
  37. 100api.magentlab.com/api/calc/girNeonatal glucose infusion rate (GIR, mg/kg/min) from the unit conversion used with AAP 2011 postnatal glucose homeostasis: GIR = (dextrose_percent x rate_ml_h) / (6 x weight_kg), or (dextrose_percent x rate_ml_kg_h) / 6. Provide rate_ml_h plus weight_kg, or rate_ml_kg_h, not both rate styles. Dextrose 2.5-25% and weight 0.4-10 kg are magent clamps, not AAP input bands. Reports GIR only. Does not order dextrose or TPN. Not a medical device.$0.005 Base289 ms1 payers100% up
  38. 100agent402.tools/api/jwt-verifyVerify an HS256/384/512 JWT signature against a secret and check expiry. Returns valid + decoded payload. (HMAC algorithms only.)$0.001 Base96 ms1 payers100% up
  39. 100agent402.tools/api/jwt-signMint a signed JSON Web Token (HMAC: HS256 default, HS384, HS512) from a payload + secret. Pairs with jwt-decode/jwt-verify to complete the trio. Deterministic - same payload, secret, and alg always produce the same token.$0.001 Base101 ms1 payers100% up
  40. 100agent402.tools/api/jwt-decodeDecode a JWT without verification: header (algorithm), payload claims (subject, issuer, expiration), expiry status, and time remaining. (Decoding only - signatures are NOT verified.)$0.001 Base104 ms1 payers100% up
  41. 100agent402.tools/api/jsonlConvert between a JSON array and JSONL/NDJSON (one JSON object per line). mode: to-jsonl (array → lines) or from-jsonl (lines → array). For streaming records to and from agents and datasets.$0.001 Base107 ms1 payers100% up
  42. 100agent402.tools/api/json-validateValidate a JSON document against a JSON Schema (draft-07 subset) and get the list of violations. Supports type, required, properties, items, enum, const, min/max, length, pattern, format, anyOf/allOf/oneOf/not, additionalProperties. Deterministic - check an agent's structured output before you trust it.$0.001 Base105 ms1 payers100% up
  43. 100agent402.tools/api/json-schema-inferInfer a draft-07 JSON Schema from sample JSON document(s). Send one sample as json, or several as samples. Heuristic merge rules: required = keys present in every sample, conflicting types become a type union, integer widens to number, and string formats (date-time, date, email, uri, uuid) are detected from values. Complements json-validate.$0.001 Base152 ms1 payers100% up
  44. 100agent402.tools/api/json-queryExtract a value from JSON by dot/bracket path, e.g. "items[2].name".$0.001 Base105 ms1 payers100% up
  45. 100agent402.tools/api/json-pointerResolve an RFC 6901 JSON Pointer (e.g. /items/0/name) against a JSON value. Returns the value or found:false.$0.001 Base103 ms1 payers100% up
  46. 100agent402.tools/api/json-mergeDeep-merge two JSON objects (b wins on conflicts; arrays are concatenated).$0.001 Base96 ms1 payers100% up
  47. 100agent402.tools/api/json-formatValidate, pretty-print (any indentation, 0-8 spaces), or minify JSON, optionally with object keys sorted. canonical: true returns the RFC 8785 (JCS) canonical form - keys sorted, no whitespace, ECMAScript number and string serialization - plus its SHA-256, for hashing and signing. Numbers are read as IEEE-754 doubles and a duplicate key keeps its last value. Returns parse errors with position when invalid.$0.001 Base103 ms1 payers100% up
  48. 100agent402.tools/api/json-flattenFlatten nested JSON to dot-path keys, or unflatten dot-path keys back to nested JSON. mode: flatten (default) | unflatten.$0.001 Base111 ms1 payers100% up
  49. 100agent402.tools/api/json-diffDeep-compare two JSON values. Returns a list of changed/added/removed paths (capped at 1000 differences).$0.001 Base91 ms1 payers100% up
  50. 100agent402.tools/api/iso-weekGet the ISO 8601 week number, ISO day-of-week, quarter, and day-of-year for any date. Useful for fiscal/reporting calendars, weekly aggregations, and sprint planning.$0.001 Base107 ms1 payers100% up
  51. 100agent402.tools/api/isbn-validateValidate an ISBN-10 or ISBN-13 checksum (hyphens/spaces ignored) and report which format it is.$0.001 Base108 ms1 payers100% up
  52. 100agent402.tools/api/irrCompute the internal rate of return (IRR) of a cashflow stream - the discount rate at which NPV = 0. Index 0 is treated as t=0 (typically the negative initial investment); indices 1..n are inflows in subsequent periods. Solved via Newton-Raphson with bisection fallback. Requires at least one positive and one negative cashflow (otherwise IRR is undefined). Multiple sign changes in the cashflows can produce multiple IRR roots - we return the first one found.$0.001 Base109 ms1 payers100% up
  53. 100agent402.tools/api/image-thumbnailMake a square thumbnail of an image - scales and center-crops to NxN (default 128). Send a base64 image and optional size. Returns the thumbnail. Deterministic, no network.$0.001 Base103 ms1 payers100% up
  54. 100agent402.tools/api/image-resizeResize an image to given pixel dimensions. Send a base64 PNG/JPEG/BMP and width and/or height (give one to scale proportionally). Returns the resized image. Deterministic, no network.$0.001 Base101 ms1 payers100% up
  55. 100agent402.tools/api/ics-parseParse iCalendar (.ics) text into structured JSON events: summary, start/end, location, organizer, attendees, status, and RRULE. Optional bounded recurrence expansion (expand:true, capped occurrences). Deterministic, pure CPU - send the ICS text, not a URL.$0.001 Base99 ms1 payers100% up
  56. 100agent402.tools/api/iban-validateValidate an IBAN: country code, length, and the ISO 13616 mod-97 checksum.$0.001 Base93 ms1 payers100% up
  57. 100agent402.tools/api/html-to-markdownConvert an HTML fragment or document you already have into clean markdown. (To fetch + convert a live URL, use /api/extract.)$0.001 Base95 ms1 payers100% up
  58. 100agent402.tools/api/html-tableExtract a <table> from an HTML string as JSON rows (header-keyed) or CSV. Useful for prices, schedules, sports stats, or anything an agent has already fetched as HTML. If multiple tables match, the first is used.$0.001 Base95 ms1 payers100% up
  59. 100agent402.tools/api/html-selectRun a CSS selector against an HTML string and return the matches (text, attrs, and optionally outerHTML for each). The deterministic alternative to regex when you already have the HTML and know the selector - pairs with /api/render or any page you've fetched yourself.$0.001 Base101 ms1 payers100% up
  60. 100agent402.tools/api/html-metaExtract <title>, <meta description>, OpenGraph/Twitter cards, canonical URL, and JSON-LD blocks from an HTML string. Distinct from /api/meta which fetches a URL - feed this the HTML you already have (from /api/render, /api/extract.body, or your own fetch).$0.001 Base89 ms1 payers100% up
  61. 100agent402.tools/api/html-linksEnumerate every <a href> in an HTML string with its anchor text and rel attribute. Optionally resolves relative hrefs against a base URL and filters by a regex on the href. The deterministic way to crawl a page's outlinks without writing a regex.$0.001 Base108 ms1 payers100% up
  62. 100agent402.tools/api/html-entitiesEncode text to HTML entities or decode them back. mode: encode (default) or decode.$0.001 Base115 ms1 payers100% up
  63. 100agent402.tools/api/hmacHMAC signature of a message with a shared key. Algorithms: sha256 (default), sha512, sha1. Returns hex and base64.$0.001 Base102 ms1 payers100% up
  64. 100agent402.tools/api/hexHex encode or decode text. mode: encode (default) or decode.$0.001 Base98 ms1 payers100% up
  65. 100agent402.tools/api/gzipCompress a string with gzip (RFC 1952) and return it as base64. Reports input bytes, output bytes, and the compression ratio so you can decide if it was worth doing. Input can be plain text (utf8) or already-binary content (base64 or hex).$0.001 Base101 ms1 payers100% up
  66. 100agent402.tools/api/gunzipDecompress a base64-encoded gzip payload. Returns the result as utf8 (text) or base64 (binary). Refuses to expand past 10MB to defend against zip bombs.$0.001 Base103 ms1 payers100% up
  67. 100agent402.tools/api/geocodeResolve a free-form address or place name to coordinates: lat/lon, display name, bounding box, place type. OpenStreetMap/Nominatim, no key.$0.001 Base107 ms1 payers100% up
  68. 100agent402.tools/api/geo-distanceGreat-circle distance between two latitude/longitude points using the haversine formula. Returns kilometers and miles. Deterministic.$0.001 Base113 ms1 payers100% up
  69. 100agent402.tools/api/gas-estimateCurrent gas price on Base, Polygon, Arbitrum, Optimism, Ethereum, Monad, Celo, Avalanche, Sei, or Robinhood Chain - for an agent budgeting a transaction: returns network, gasPriceGwei and gasPriceWei (decimal strings) from the chain's own eth_gasPrice, the node's suggested all-in price per gas unit. Multiply by the gas a transaction uses (21000 for a plain transfer) for its fee. Read-only.$0.001 Base84 ms1 payers100% up
  70. 100agent402.tools/api/forecast-sesSimple exponential smoothing (SES) - level-only forecast for series without trend or seasonality. Higher alpha (closer to 1) tracks recent values aggressively; lower alpha (closer to 0) smooths through noise. Default alpha=0.3 is a common conservative pick; pass an explicit alpha or use forecast-eval to pick the one that minimizes backtest error. Forecast is flat (= last fitted level) for all horizons.$0.001 Base89 ms1 payers100% up
  71. 100agent402.tools/api/forecast-naiveThree textbook baseline forecasts: mean (forecast = average of history), naive (forecast = last value), drift (linear extrapolation from first to last point). Use as a sanity floor - any sophisticated method (SES, Holt, Holt-Winters) should beat the best of these on a backtest, otherwise the extra complexity isn't earning its keep. Returns point forecasts + 95% prediction intervals per Hyndman §3.1.$0.001 Base115 ms1 payers100% up
  72. 100agent402.tools/api/forecast-holt-wintersHolt-Winters triple exponential smoothing - level + trend + seasonal component. Use for series with a repeating cycle (weekly retail traffic, monthly utility usage, quarterly revenue). Additive seasonality (constant amplitude) or multiplicative (amplitude grows with level). `period` is optional - if omitted, the kit auto-detects via autocorrelation on first differences and surfaces what it picked (with the ACF strength) so you can audit. Needs at least two full seasonal cycles to fit reliably.$0.001 Base100 ms1 payers100% up
  73. 100agent402.tools/api/forecast-holtHolt's linear trend method - level + trend (no seasonality). Two smoothing parameters: alpha (level) and beta (trend). Forecast extrapolates as a straight line from the last fitted level along the last fitted trend, so it grows or shrinks linearly with horizon. Use this when your series has a persistent up/down trend but no seasonal cycle (e.g. a SaaS MRR climb, a deflating cohort retention curve).$0.001 Base96 ms1 payers100% up
  74. 100agent402.tools/api/forecast-evalBacktest a forecasting method on the input series by holding out the last `testSize` observations, forecasting them, and computing MAPE (mean absolute percentage error) + RMSE (root mean squared error). Lets an agent pick which method (mean / naive / drift / ses / holt / holt-winters) actually fits its data before committing to a forward forecast.$0.001 Base124 ms1 payers100% up
  75. 100agent402.tools/api/financeFinancial math. op: "compound" (future value of principal at a rate) or "loan" (monthly payment + total for a loan).$0.001 Base109 ms1 payers100% up
  76. 100agent402.tools/api/feedback/summaryWhat paying buyers said about each tool on this server: good and bad counts and the number of distinct wallets behind them, over a window you choose. Every verdict counted here was written by the wallet that paid for that specific call, one per settlement transaction, so the numbers cannot be inflated by anyone who did not buy. Counts only - no payer addresses and no review text, ever. Bad counts are published beside good ones, including ours.$0.001 Base154 ms1 payers100% up
  77. 100agent402.tools/api/epoch-convertConvert between Unix epoch timestamps and ISO 8601 date strings in both directions. Provide either an epoch (seconds or milliseconds) or an ISO date string. Returns both representations plus UTC and date components.$0.001 Base89 ms1 payers100% up
  78. 100agent402.tools/api/ens-resolveResolve an ENS name (e.g. vitalik.eth) to its Ethereum address - so an agent can turn a human-readable recipient into a payable address. Read-only on Ethereum mainnet.$0.001 Base93 ms1 payers100% up
  79. 100agent402.tools/api/email-validateValidate an email address: syntax check plus live MX record lookup on the domain (deliverability signal, not a guarantee).$0.001 Base111 ms1 payers100% up
  80. 100agent402.tools/api/effective-annual-rateConvert a nominal annual rate (APR) compounded m times per year into the effective annual rate (EAR / APY): (1 + apr/m)^m - 1. Set continuous:true for e^apr - 1.$0.001 Base95 ms1 payers100% up
  81. 100agent402.tools/api/easter-dateCompute the date of Easter Sunday for a given year using the Anonymous Gregorian algorithm (Meeus/Jones/Butcher). Also returns Good Friday, Ash Wednesday, Palm Sunday, Pentecost, and the day-of-year for Easter.$0.001 Base101 ms1 payers100% up
  82. 100agent402.tools/api/durationParse a duration like "2h30m" / "1d4h" / "90s" to seconds, or humanize a number of seconds.$0.001 Base94 ms1 payers100% up
  83. 100agent402.tools/api/dedupe-linesRemove duplicate lines, preserving first-seen order. Returns the deduped text and how many were removed.$0.001 Base99 ms1 payers100% up
  84. 100agent402.tools/api/day-of-yearGet the day number within the year (1-366) for any date, plus days remaining, leap-year status, percent of year complete, and a simple (Sunday-start) week number.$0.001 Base107 ms1 payers100% up
  85. 100agent402.tools/api/date-formatParse a datetime from any format (ISO 8601, Unix timestamp in seconds or milliseconds, RFC 2822, or natural date string) and return it in every common format: ISO 8601, Unix (seconds), Unix (ms), RFC 2822, date-only, time-only, day of week, and human-relative (e.g. '3 days ago').$0.001 Base118 ms1 payers100% up
  86. 100agent402.tools/api/date-diffDifference between two dates/times in ms, seconds, minutes, hours, days, and a human summary.$0.001 Base92 ms1 payers100% up
  87. 100agent402.tools/api/csv-lintValidate CSV structure: consistent column counts across rows, properly closed quotes, delimiter detection. Returns row/column counts and any structural errors. Pure CPU.$0.001 Base116 ms1 payers100% up
  88. 100agent402.tools/api/cron-nextParse a 5-field cron expression and return the next N run times (UTC).$0.001 Base102 ms1 payers100% up
  89. 100agent402.tools/api/crc32CRC-32 checksum of a text string (hex), the IEEE polynomial used by zip/png/gzip.$0.001 Base94 ms1 payers100% up
  90. 100agent402.tools/api/country-infoCountry facts by name or ISO code: official name, capital, region, currencies, languages, timezones, dialing code, TLD, and more. Committed open dataset (world-countries, ODbL, plus the IANA timezone country map) - offline and deterministic.$0.001 Base113 ms1 payers100% up
  91. 100agent402.tools/api/countCount characters, words, lines, and (optionally) occurrences of a substring in text.$0.001 Base159 ms1 payers100% up
  92. 100agent402.tools/api/correlationPearson correlation coefficient between two equal-length numeric series. Returns r (the correlation, -1 to 1), r² (variance explained), n (sample size). Use this to ask things like: is a stock's daily return correlated with a macro indicator? Are two FRED series moving together?$0.001 Base98 ms1 payers100% up
  93. 100agent402.tools/api/compress-compareRun the same input through gzip, brotli, and raw deflate at max settings and report each one's output size and ratio. Use this to decide which algorithm to actually use - the answer depends on your content (binary often resists compression entirely; English prose squeezes well with brotli; JSON sits in between).$0.001 Base134 ms1 payers100% up
  94. 100agent402.tools/api/colorConvert a color between hex, RGB, and HSL. Accepts "#1a2b3c", "rgb(26,43,60)", or "hsl(210,40%,17%)".$0.001 Base107 ms1 payers100% up
  95. 100agent402.tools/api/cidrParse an IPv4 CIDR block: network address, broadcast, first/last host, netmask, and host count. Optionally test if an IP is inside it.$0.001 Base116 ms1 payers100% up
  96. 100agent402.tools/api/checksumCompute MD5, SHA-1, SHA-256, SHA-512, and CRC32 checksums of a string in a single call. Useful for verifying file or payload integrity across different checksum standards without needing five separate tools.$0.001 Base110 ms1 payers100% up
  97. 100agent402.tools/api/screenshotScreenshot any public URL in headless Chromium. Returns a PNG image. Use when you need VISUAL evidence (layout, charts, a rendered receipt); when you need the text, extract or render are cheaper and machine-readable.$0.004 Base105 ms1 payers100% up
  98. 100agent402.tools/api/chain/total-supplyThe circulating total supply of an ERC-20, read from the token contract itself rather than from an aggregator, so it is the number the chain holds at the block you asked for. Returns the raw uint256 and the same figure formatted with the token's own decimals. A contract that does not implement totalSupply answers 422 rather than a fabricated zero. EVM chains: ethereum, base, polygon, arbitrum, optimism.$0.001 Base147 ms1 payers100% up
  99. 100agent402.tools/api/chain/storageRead one 32-byte storage slot from a contract, the raw state under whatever the source code calls it. Returns the word as hex plus three readings of the same bytes - unsigned integer, address (low 20 bytes) and boolean - because a slot is untyped on chain and only the caller knows which it meant. Useful for proxy implementation slots, paused flags and any value the ABI does not expose. EVM chains: ethereum, base, polygon, arbitrum, optimism.$0.001 Base126 ms1 payers100% up
  100. 100agent402.tools/api/chain/pendingThe chain's pending block: how many transactions are queued for the next block, the base fee they will pay, and the gas already used against the limit. This is the node's own view of what is about to be mined, so it answers "is the chain congested right now" without an indexer. Transaction hashes are included when the node returns them. EVM chains: ethereum, base, polygon, arbitrum, optimism.$0.001 Base138 ms1 payers100% up