22 utility endpoints for AI agents, priced from $0.002 per call.
Every endpoint charges per call in USDC over x402 on Base. Call it unpaid to get the exact terms in a 402, sign them, retry. No API key, no account, no subscription, no minimum.
| tool | price | what it does |
|---|---|---|
| url-metadata | $0.005 | Extracts title, description, image, and clean text from a URL — built for other agents to consume. |
| domain-check | $0.01 | Checks whether a domain is available to register via RDAP, or who owns it and when it expires if not. |
| email-check | $0.005 | Validates email syntax and confirms real MX records for the domain — filters out addresses that can't receive mail. |
| html-to-markdown | $0.003 | Converts HTML to clean Markdown — so an agent doesn't have to build its own converter. |
| qrcode | $0.002 | Generates a QR code (PNG, base64) for a text string or URL. |
| pdf-extract | $0.01 | Extracts the text from a PDF given its URL. |
| ssl-check | $0.005 | Checks a domain's TLS certificate: validity, issuer, and days until expiry. |
| language-detect | $0.002 | Detects the language of a text (186 languages supported), returning the top 3 most likely matches. |
| json-validate | $0.002 | Validates a JSON payload against a JSON Schema (draft 2020-12) and returns the exact validation errors. |
| verify-signature | $0.002 | Recovers the signer of an EIP-191 or EIP-712 signature and checks it against a claimed address. |
| financial-id-check | $0.002 | Validates an IBAN (mod-97 checksum), BIC/SWIFT (ISO 9362 format), or card number (Luhn checksum). |
| geo-distance | $0.002 | Calculates great-circle distance (km/mi) and initial bearing between two lat/lng coordinates. |
| markdown-to-html | $0.003 | Converts Markdown to HTML — the reverse direction of html-to-markdown. |
| timezone-convert | $0.002 | Converts an ISO 8601 instant into the local wall-clock time of any IANA time zone, DST-aware. |
| token-count | $0.002 | Counts tokens in a text using real GPT-family BPE encodings (cl100k_base or o200k_base) — check length before calling an LLM. |
| hash-digest | $0.002 | Hashes text with sha256, sha512, sha1, md5, sha3-256, or keccak256 — optionally as an HMAC with a secret key. |
| jwt-decode | $0.002 | Decodes a JWT's header and claims and reports its time status (active, expired, not yet valid) — without signature verification. |
| url-parse | $0.002 | Parses a URL into its components and returns a normalized canonical form with tracking parameters (utm_*, fbclid, gclid…) removed. |
| eth-address | $0.002 | Validates an EVM address and returns its EIP-55 checksummed form; flags bad checksums and the zero address. |
| ip-check | $0.002 | Classifies an IPv4/IPv6 address (public, private, loopback, link-local, reserved…) and tests it against optional CIDR ranges — an SSRF/allowlist check. |
| x402-discover | $0.02 | Searches an index of live x402 seller endpoints — each verified by knocking, not scraped — filtering by capability, max price and network. |
| page-build | $0.02 | Builds one complete, self-contained HTML page from structured blocks — responsive, light/dark aware, every value escaped, zero external requests. |