Every agent-payable API.

Rank blockchains by total DeFi value locked (TVL) across all protocols

Rank blockchains by total DeFi value locked (TVL) across all protocols

Look up a DeFi protocol's current total value locked (TVL), by chain, plus market cap

Aggregated demand data from one provider's own paid x402 routes: requests and price requests per route and day, outcomes by HTTP status, settled payments with conversion and repeat rate, caller classes and country distribution. Not a market sample. Raw identifiers and payer addresses are never returned. Measurement started 2026-07-23.

x402 Demand Signal settlement-verified paid-call counts. Hosted API via Speedbot; provider price plus 8% fee. version=external_api_16b188998d4fe9a347e3a30d02bc6dc5 checksum=16b188998d4fe9a347e3a30d02bc6dc5513cafd8ab85fdfbd9586744beaf9864 listing=44973ebfe1602a6c277f236116266ff37d9a82e245fd6ff99eb2cb06da1cb7aa

Checks an x402 API origin the way x402scan, the CDP Bazaar and agents read it: fetches /openapi.json and /.well-known/x402, then calls each paid route without paying (up to 30) and decodes its 402. Reports routes that do not answer 402, missing or v1-only PAYMENT-REQUIRED headers, prices that differ from the OpenAPI document, resource URLs that differ from the route, wrong USDC EIP-712 domains, missing Bazaar extensions and missing descriptions.

Asks the public x402 facilitators (CDP, x402.org, PayAI, x402.rs, Dexter, Daydreams, OpenX402, Mogami, Heurist) for GET /supported right now: whether each answers, its latency, and the x402 versions, schemes and networks it settles. Pass network to keep only those that support it.

Builds an x402 v2 PaymentRequired object for a price in dollars on one or more networks, with the right USDC contract, atomic amount and EIP-712 domain (name and version) for each, plus the base64 PAYMENT-REQUIRED header value to send with the 402.

Reference for x402 sellers and clients: each network's CAIP-2 id, v1 name, chain id, USDC contract, decimals, the EIP-712 domain name and version its USDC signs over (read from the contracts), and explorer. Pass network to get one.

Encodes a PaymentRequired, PaymentPayload or settlement response object as the base64 value of its x402 header, for hand-written servers, clients and tests, and reports the same problems /v1/decode finds.

Decodes a PAYMENT-REQUIRED, PAYMENT-SIGNATURE or PAYMENT-RESPONSE header (x402 v2, or X-PAYMENT / X-PAYMENT-RESPONSE of v1), base64 or JSON, detecting which it is. Explains it in plain terms (price in dollars, network, payer and payee, validity window, explorer link) and lists problems: wrong USDC EIP-712 domain, expired or not-yet-valid authorizations, amount or payee mismatches, missing Bazaar extension.

Generates the discovery documents directories and agents read for a list of paid endpoints (up to 100): an OpenAPI 3.1 document with x-payment-info prices and examples, the /.well-known/x402 resource list and an llms.txt, in the shape x402scan and the CDP Bazaar index.

Is this x402 endpoint safe to pay? Check it before your AI agent pays: go / caution / no_go, the recommended payment option, and why (payment would fail, over your budget, price above advertised, not HTTPS, unknown token). Never pays the endpoint. Cached 10 min.

Why is my x402 endpoint broken? Diagnose and debug an x402 payment endpoint (or MCP server) when payments fail: checks the 402 challenge, accepts[] (network, payTo, amount, asset), resource URL, Solana settlement readiness, which wallets and agents can pay, Bazaar/OpenAPI discovery and the browser paywall. Returns every check with a fix hint. Read-only: never pays.

Does this x402 endpoint really deliver? x402 Doctor buys it once with the example input its own listing declares (at most $0.1, USDC on Base), checks the answer against the declared output schema and measures the charge on chain. Answers with a job id at once; the result is public, usually within 30 minutes. For sellers who want proof, and buyers before a big order.

How do I fix my broken x402 endpoint? Diagnoses it, then returns per problem the concrete change as code for your stack (Express, Next.js, Hono or raw HTTP), filled in with your own payTo, amount, network and route.

Should my agent pay this expensive x402 endpoint? The pre-payment verdict plus the full diagnosis, the 30-day history per day, how reliable the seller's other endpoints are and whether the endpoint moved domains. Never pays the endpoint.

Are these x402 endpoints safe to pay? Up to 10 endpoints in one call (?url=a&url=b): per endpoint go / caution / no_go, the recommended payment option and why, plus totals. For marketplaces and agents that weigh several services. Never pays the endpoints.

Resolve an ENS name to an address, or reverse-resolve an address to its primary ENS name

Resolve an ENS name to an address, or reverse-resolve an address to its primary ENS name

Pre-payment check of an x402 endpoint: one unpaid request, decodes the 402 offer (v1/v2): network, USDC or not, USD price, payTo, testnet, red flags.

A random Bible verse: from about 320 often quoted, encouraging verses (pool=popular, default), or from all 31,000 (pool=all), optionally only the Old or New Testament. Public-domain translations: BSB, WEB, KJV.

Draw an omikuji, the fortune slip of Japanese shrines and temples, in English: the fortune (Great blessing 大吉 17%, Blessing 吉 35%, Middle blessing 中吉 6%, Small blessing 小吉 4%, Future blessing 末吉 8%, Bad fortune 凶 30%), a message, and readings for wish, awaited person, lost item, travel, business, study, love and health, with a lucky number, color and direction. Give a seed for a repeatable draw.

The text of a Bible verse or passage by reference (John 3:16, Romans 8:28-30, Psalm 23, Genesis 1:1-2:3, 1 Cor 13:4-7), up to 200 verses, verse by verse, from public-domain translations: Berean Standard Bible, World English Bible, King James Version. Optionally the same passage in other translations to compare. Unknown references answer 404 and are not charged.

A fortune cookie: one short, upbeat fortune (80 written for this service) and six lucky numbers from 1 to 49. Give a seed for a repeatable draw.

One well-known Bible verse or short passage per day, the same for every caller on a date (UTC), chosen from about 320 often quoted verses. For a daily devotional, a greeting, or a status message. Public-domain translations: BSB, WEB, KJV.

Find Bible verses containing every given word (in any order), or an exact phrase in double quotes, in one public-domain translation (BSB, WEB, KJV); optionally within one book or testament. Returns the total count and up to 100 verses in canonical order.

A random family-friendly joke with setup and punchline as separate fields, written for this service (133 jokes), optionally from one category: dad, programming, ai, science, math, animals, food, work, crypto. Give id to get one joke again.

Current gas price and EIP-1559 fee estimate for a chain (base, ethereum, polygon, arbitrum, optimism)

Current gas price and EIP-1559 fee estimate for a chain (base, ethereum, polygon, arbitrum, optimism)

A one-page hail report for a US address and date to share with a homeowner, adjuster or contractor: verdict, largest radar hail estimates by distance, a map of hail sizes within 10 miles, radar hail signatures in time order (when it fell), spotter reports, and NOAA's final Storm Events record with damage notes when published. Returns a private link valid for 1 year. Not found addresses are not charged.

Every day with hail at a US address or lat/lon over up to 5 years (from 2020-10-14): the dates when NOAA's radar estimate of hail size (MRMS MESH) reached 0.75 inch or a size you choose within 1, 3, 5 or 10 miles, with the largest size each day. For property due diligence, roof age questions and claim history. Not found addresses are not charged.

Hail at a US address or lat/lon on one date: the largest NOAA radar estimate of hail size (MRMS MESH) at the place and within 1, 3, 5 and 10 miles, NEXRAD hail signatures, nearby spotter reports, and a verdict (hail_likely, hail_possible, no_hail_detected). Dates from 2020-10-14. For roofing, insurance claims and property checks. Not found addresses and dates without data are not charged.

Heartbeat endpoint billed via a batch-settlement payment channel

Heartbeat endpoint billed via a batch-settlement payment channel. Independently monitored by x402-list.com: 100% uptime since Oct 27, 2026, 14/14 x402 compliance checks (as of Oct 31, 2026). Evidence: https://x402-list.com/services/agentx402pay

Check whether an ENS identity name for an AI agent, API or MCP server is available on x402 Identity Hub (*.402bot.eth, *.402api.eth, *.402mcp.eth). Returns availability, the mint fee and where to register.

Check whether an ENS identity name for an AI agent, API or MCP server is available on x402 Identity Hub (*.402bot.eth, *.402api.eth, *.402mcp.eth). Returns availability, the mint fee and where to register.

Convert an image at a URL to another format, with an optional quality or lossless encoding. JPEG output gets a white background where the image was transparent.

Resize an image at a URL to a width, a height or both, keeping the aspect ratio inside the box by default (cover, contain, inside, outside or fill), optionally converting it. Returns a signed URL of the result, valid for an hour.

Make an image smaller in bytes: re-encode it (mozjpeg for JPEG, palette quantization for PNG) with metadata removed, optionally scaled down to a maximum width or converted, and report how much was saved.

What a page shows while an image loads: its BlurHash, a tiny blurred WebP preview as a data URL, its average color and its dimensions.

The dominant colors of an image with their share of it, and its average color, as hex and RGB, for palettes, theming and search.

A square thumbnail of an image, smart-cropped around its most interesting region, as WebP by default.

Format, dimensions, megapixels, bytes, channels, transparency, color space, bit depth, DPI, orientation, animation and pages, ICC profile, and EXIF camera details (make, model, date taken, exposure, aperture, ISO, focal length, GPS position) of an image at a URL.

Apply up to 10 operations in order: rotate (angle), flip, flop, grayscale, blur (sigma), sharpen, negate, trim (cut uniform borders), tint (color), modulate (brightness, saturation, hue).

Cut a region out of an image (left, top, width, height), or, without left and top, crop it to the given size around its most interesting region (libvips attention strategy).

Draw a line of text over an image at a corner, an edge or the center, with a size relative to the image width, a color and an opacity.

Call before trusting or paying a third-party x402 seller: catalog-vs-live integrity -- verify an x402 listing (payee, price, network, service, tags, bazaar block) against the live 402; an endpoint preflight for x402 catalog vs live offers, seller trust and listing consistency so an agent can skip dead or mismatched endpoints (JSON).

Call before trusting or paying a third-party x402 seller: catalog-vs-live integrity -- verify an x402 listing (payee, price, network, service, tags, bazaar block) against the live 402; an endpoint preflight for x402 catalog vs live offers, seller trust and listing consistency so an agent can skip dead or mismatched endpoints (JSON).

x402 market intelligence with current catalog-attributed USDC flow, address-level demand signals and separately labeled value-matched history. Attribution is not exclusive protocol-intent proof.