Development x402 offerings

hreflang Map Builder — Builds the complete hreflang annotation set for a multilingual site or a multi-region site from a list of page URLs, answered as JSON only. Every page lists itself and all its alternates, every pair is reciprocal, x-default appears only when a fallback page is named, and codes are checked against ISO 639-1, ISO 3166-1 Alpha 2 and ISO 15924 instead of copied. Reports a bad code, a redirecting, noindexed or non-canonical URL and a page that is not a translation instead of p…

Run 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.

Return the current Bitcoin-focused Crypto Fear & Greed reading and an optional bounded recent daily history from Alternative.me. Forest preserves the provider classification and prominent source attribution; it does not synthesize an asset-specific altcoin score, forecast price, create a trading signal, recommend a trade or access any account or wallet. Base mainnet USDC

Compare two public OpenAPI or Swagger contracts and determine whether the API update contains directly observable breaking compatibility changes. Detects removed operations, newly required request in…

Inspect one public MCP HTTP endpoint, auto-detect the stateless 2026-07-28 era or fall back to the legacy initialize lifecycle, then normalize tools/list schemas into a deterministic SHA-256 contract…

Resolve the current public GitHub repository state without cloning or customer OAuth. Archived, fork, branch and license fields reflect only public API facts; private repositories are unsupported. Ba…

Auto-detect a public MCP endpoint era, fingerprint its complete normalized tools/list schema contract and optionally compare it with a caller-provided previous SHA-256 hash. Cosmetic descriptions are…

Look up one exact HTTP method and path in a public OpenAPI or Swagger contract and report whether that documented API endpoint exists. This is a contract/endpoint existence check only; Forest reads t…

Inspect the declared request and response contract for one exact OpenAPI or Swagger operation before integration. Returns parameters, request-body content types, response statuses/content types and d…

Normalize declared package license metadata toward SPDX; no legal compatibility conclusion. Base mainnet USDC

Validate caller-supplied JSON against Forest bounded JSON Schema subset v1 before an agent trusts or forwards structured output. Returns deterministic machine-readable violations with stable paths; p…

Detect whether normalized public npm or PyPI package registry state changed since a saved fingerprint. Returns a deterministic SHA-256 fingerprint for package/version existence, latest/resolved versi…

Discover machine-readable integration documentation from a public developer/docs page: llms.txt, Markdown alternates, API/auth docs, OpenAPI or Swagger specifications, and MCP candidates. Candidates …

Compose bounded API discovery with one deterministic OpenAPI or Swagger preflight into a concise agent-readiness state. The check does not authenticate, call discovered API operations, or prove busin…

Fingerprint the normalized metadata state of one public GitHub release and optionally compare it with a caller-provided previous SHA-256 hash. Forest uses the existing bounded release lookup and does…

Verify OpenAPI/Swagger document reachability, parseability, operations/auth/servers. Base mainnet USDC

Cheaply detect material public repository state changes with a deterministic hash of existence, branch and archive state. Timestamps and unrelated metadata do not trigger a change. Base mainnet USDC

Validate one caller-supplied JSON request or response payload against the documented JSON schema for one exact OpenAPI or Swagger operation. Forest fetches only the supplied public specification, nev…

Discover the callable public API behind a developer or documentation page: identify candidate API base URLs, developer portals, machine-readable API docs and authentication documentation for integrat…

Extract bounded static HTML form structure without submitting anything. Forest returns field names/types/labels/constraints and submit-control structure, but never current values, textarea contents, …

Fingerprint the structural machine contract of a public OpenAPI or Swagger specification and compare it with an optional previous SHA-256 fingerprint to detect API contract drift. Paths, operations, …

Resolve a public GitHub release into the most plausible downloadable asset for a normalized OS/architecture target, excluding source/signature/checksum files and linking checksum companions when pres…

Normalize the latest public GitHub Actions workflow/run state. Reads only; dispatch, rerun, cancellation, private repositories and customer OAuth are unsupported. Base mainnet USDC

HTTP 100 Continue: what it means (the client may send the request body), what a client should do (continue sending), the class it belongs to, whether it is retryable and idempotency-safe, the defining RFC, and common causes. Precise one-code reference for error handling in agents and integrations. $0.01 per call.