the402 x402 endpoint directory

Compute md5/sha1/sha256/sha512 (or HMAC with a key) of a string; hex + base64 output.

Check endpoint status, latency, redirects, content type, and JSON validity for $0.001 USDC. One single-fetch structure

Compute keccak256/sha256, a 4-byte function selector, an event topic0, or an ENS namehash/labelhash from a string or h

Image resize and conversion API for agents: resize or convert one base64 PNG, JPEG, or WebP with a maximum dimension f

News search API with publisher links for agents: search recent GDELT Project news metadata for $0.001 USDC. Returns at

US weather forecast API for agents: return a normalized National Weather Service (NOAA/NWS) multi-period forecast for

Oracle price-source family classification across 35 tracked crypto perp venues — which venues derive their index price

Generate a QR code from text as PNG (base64) or SVG. Custom module size, quiet-zone margin, and hex colours. Determini

Check whether an approved Base token swap is eligible before supplying a wallet. Returns verified token contracts, ind

Purchase and download the Broken Key Remapper software (one-time license).

Distributed lock / idempotency primitive for multi-agent swarms. claim(key) returns a token if free (with TTL); releas

micropay-test-suite: verifies your agent can complete an x402 payment (Base Sepolia testnet)

Current date, time, and timestamp for any timezone worldwide. Returns UTC and local timestamps, unix epoch, day of wee

Current NBA standings by conference — wins, losses, win percentage, and conference rank for all 30 teams.

Email deliverability verification

Current gas prices on Ethereum mainnet and Base — base fee, priority fee, and EIP-1559 estimates in Gwei as JSON. No A

Guess extension from MIME type. Call when you name agent-generated files from content-type. Returns ext, mime, known f

Guess MIME type from file extension. Call when you set Content-Type hints for agent uploads. Returns mime, ext, known

Parse IPv4 into octets. Call when you validate IP literals held by agents. Returns valid flag and octets for $0.001 US

Validate http(s) URL shape. Call when you preflight agent-held URLs before fetch/extract. Returns valid boolean for $0

XML-escape text for safe embedding. Call when you build XML fragments from agent strings. Returns escaped text for $0.

HTML-unescape entities in text. Call when you reverse entities from agent-held HTML snippets. Returns unescaped text f

Percent-encode text for query components. Call when you build safe query values for agent URLs. Returns encoded text f

Format a byte count as human-readable binary units — first-party local utility for agent preflight and proven micro-ut

Clamp a percentage-like number into a min/max range — first-party local utility for agent preflight and proven micro-u

Pick one item from a list using non-negative weights — first-party local utility for agent preflight and proven micro-

Generate a random RFC 4122 UUID v4 for agent correlation IDs — first-party local utility for agent preflight and prove

Parse ISO-8601 duration subset PnDTnHnMnS into total seconds — first-party local utility for agent preflight and prove

Split host and optional port from a host:port or URL authority string — first-party local utility for agent preflight

Validate a URL/product slug against a safe lowercase hyphen pattern — first-party local utility for agent preflight an

Classify an HTTP status code into family with retry hint — first-party local utility for agent preflight and proven mi

Classify whether a failed HTTP-style call is safe to auto-retry — first-party local utility for agent preflight and pr

Check whether a published USDC price stays under a buyer ceiling — first-party local utility for agent preflight and p

Measure payload byte size against soft and hard ceilings before paying — first-party local utility for agent preflight

Estimate decoded byte size of a base64 string without full decode — first-party local utility for agent preflight and

Return hash digest and byte size for caller-held content — first-party local utility for agent preflight and proven mi

Convert an amount with a caller-supplied FX rate (no live feed) — first-party local utility for agent preflight and pr

Heuristic content-type sniff from sample bytes or filename — first-party local utility for agent preflight and proven

Match a URL against host/path allowlist patterns before egress — first-party local utility for agent preflight and pro

Compare ETag validators including weak tags and If-None-Match lists — first-party local utility for agent preflight an

Lowercase HTTP header keys and drop hop-by-hop headers — first-party local utility for agent preflight and proven micr

Pick named query parameters from a URL or raw query string — first-party local utility for agent preflight and proven

Check path allow/disallow against caller-held robots.txt rules — first-party local utility for agent preflight and pro

Lint a text-to-image prompt for length and basic policy tokens before paying — first-party local utility for agent pre

Sentence-case a string for $0.001 USDC. Use this when an agent needs sentence case inside a workflow without installin

Title-case a string for $0.001 USDC. Use this when an agent needs title case inside a workflow without installing a li

Calculate loyalty points, reward value, effective rebate, and a ledger-ready idempotent credit instruction for $0.001

Turn an OpenAPI document into title, version, path counts, tags, and auth hints for $0.001 USDC. One single-fetch stru

Read any server's x402 resources, payment networks, and canonical paths for $0.001 USDC. One single-fetch structured r

Current weather conditions for any global location — temperature, feels-like, humidity, precipitation, wind, and human