Browse operation contracts · Static machine index · OpenAPI release reference · Build manifest

Inspect protocol envelopes and HTTP representations

Check or compose supplied protocol records, conditional-request evidence and bounded byte representations.

How to choose

Match the exact wire profile and representation assumptions. A local envelope or range calculation does not contact a server or authenticate evidence.

No live network exchange, server-state observation, receipt authentication or full protocol certification.

11 operation contracts

OpenAPI Response Contract Check

Check one supplied OpenAPI 3.1 inline response against status, explicit JSON media type, parsed JSON body and deserialized headers. Exact status precedes class and default; unsupported references and schemas are explicit. Not full OpenAPI validation, wire decoding, authentication or request execution.

Choose for: Validate supplied API response body and response headers against OpenAPI Select exact status, response class or default before checking JSON output

Outside this profile: Full OpenAPI conformance, reference resolution, parameter serialization, wire parsing or live API tests Proving absence of body is an error solely because content is documented

Proposed nominal USD 0.01 per successful call, excluding payer wallet/network fees. Protocol definitions: x402, mpp. Static exact contract

MCP Tool Result Check

Inspect a supplied MCP CallToolResult text/structured-content envelope and optional object-root output schema. Separates tool execution errors, missing structured output, invalid text blocks and unsupported content/schema features. Does not invoke tools or prove MCP interoperability, provenance, or trust.

Choose for: Validate MCP tool result structuredContent against outputSchema Distinguish tool execution error from malformed tool result envelope

Outside this profile: MCP lifecycle, JSON-RPC correlation, binary/media/resources, annotation validation or security verdicts Full JSON Schema or trusting tool output because its shape passes

Proposed nominal USD 0.01 per successful call, excluding payer wallet/network fees. Protocol definitions: x402, mpp. Static exact contract

SSE Snapshot Event Parser

Parse a completed, already-decoded server-sent-event text snapshot into dispatched events, committed last-event ID, exact decimal retry milliseconds and ignored-field count. Handles CR/LF/CRLF, one leading BOM, blank dispatch and incomplete EOF discard. No live connection, resumption or provider-specific event semantics.

Choose for: Parse saved SSE event stream and inspect last event ID Diagnose missing events caused by incomplete final blank line

Outside this profile: Opening an SSE stream, joining arbitrary incremental chunks or retrying connections Raw-byte UTF-8 decoding, provider completion markers or JSON-RPC protocol validation

Proposed nominal USD 0.005 per successful call, excluding payer wallet/network fees. Protocol definitions: x402, mpp. Static exact contract

NDJSON Artifact Inspector

Inspect supplied newline-delimited JSON text into parsed records with line numbers and exact UTF-16 spans, bounded per-line diagnostics, explicit empty-line policy and optional final-newline requirement. Rejects bare CR, unsafe keys, nonfinite numbers and excessive structure; no lossless number or duplicate-key preservation.

Choose for: Validate JSON Lines or NDJSON batch artifacts with exact failing line numbers Parse newline JSON tool logs while keeping source offsets and malformed-line diagnostics

Outside this profile: Streaming network ingestion, arbitrary log formats or multiline JSON documents Lossless large numbers, duplicate-key detection or implicit repair

Proposed nominal USD 0.005 per successful call, excluding payer wallet/network fees. Protocol definitions: x402, mpp. Static exact contract

Scalar URI Template Expansion

Expand RFC6570 scalar string variables with simple, reserved, fragment, label, path, path-parameter and query operators. Explicitly rejects prefix/explode modifiers, lists/maps and non-ASCII variable names/literals. Missing/null variables are omitted with an audit list; no URL fetch, safety verdict or encoding guesswork.

Choose for: Expand scalar RFC6570 API URL templates without accidental slash or query injection Construct path and query expressions with explicit reserved expansion

Outside this profile: Full RFC6570 level 4, prefix/explode/list/map expansions or arbitrary Unicode template literals URL authorization, host allowlisting, SSRF safety or fetching

Proposed nominal USD 0.003 per successful call, excluding payer wallet/network fees. Protocol definitions: x402, mpp. Static exact contract

CloudEvents JSON Envelope Check

Inspect one structured CloudEvents 1.0 JSON artifact for required attributes, string restrictions, time/calendar profile, data/data_base64 conflicts, canonical Base64 and primary extension mappings. URI checks are ASCII lexical only. No webhook signatures, transport binding, extension semantics or event authenticity checks.

Choose for: Validate a supplied CloudEvents structured webhook envelope before ingestion Detect conflicting CloudEvents payload modes and invalid extension attributes

Outside this profile: Authenticating webhook senders, binary HTTP bindings, schema fetching or complete URI conformance Leap-second validation or secondary structured extension mappings

Proposed nominal USD 0.01 per successful call, excluding payer wallet/network fees. Protocol definitions: x402, mpp. Static exact contract

HTTP Link Header Parser

Parse supplied HTTP Link field values with quote-aware commas, escaped quoted parameters, relations and anchor context. Preserves raw URI references/parameters and first-rel semantics; flags unsupported extended parameters. Does not resolve/fetch links, apply anchors, inspect live pagination or certify full RFC8288 conformance.

Choose for: Extract pagination next and last relations from supplied HTTP Link headers Parse quoted comma parameters and detect anchor-dependent links

Outside this profile: Following pagination links, URL resolution, link safety or decoding extended title parameters Treating an anchored link as if it belonged to the original response context

Proposed nominal USD 0.005 per successful call, excluding payer wallet/network fees. Protocol definitions: x402, mpp. Static exact contract

HTTP Entity-Tag Preconditions

Evaluate supplied If-Match and If-None-Match against caller-asserted representation existence/current ETag, preserving strong/weak comparison and precondition order. Gives conditional 304/412 or proceed guidance only. Excludes date/range/freshness, duplicate-write exceptions, permission decisions and live requests.

Choose for: Evaluate conditional HTTP ETag cache validation and optimistic concurrency preconditions Distinguish weak If-None-Match from strong If-Match and wildcard existence

Outside this profile: Cache freshness, date validators, HTTP ranges, fetching resources or deciding replay authorization Guaranteed success status or inferring current representation from an ETag alone

Proposed nominal USD 0.003 per successful call, excluding payer wallet/network fees. Protocol definitions: x402, mpp. Static exact contract

Compose an HTTP request signature base

Compose inert ASCII RFC 9421 request signature-base and Signature-Input artifacts from ordered, supplied non-secret field examples and explicit context. Does not sign, verify, authorize or send requests.

Choose for: Build an inert signature-base example from supplied request context and ordered ASCII field lines Compare raw and binary-wrapped field boundaries before using an external signer

Outside this profile: Signing, verification, keys, credentials, authentication, authorization, payment, or live HTTP requests Responses, trailers, CONNECT, query-parameter selection, Structured Field parsing, Unicode or obs-text fields Secret or production request payloads, including secrets in targets, free text or key identifiers

Proposed nominal USD 0.006 per successful call, excluding payer wallet/network fees. Protocol definitions: x402, mpp. Static exact contract

Resolve exact HTTP byte ranges

Resolve a strict supplied HTTP bytes Range field against an exact decimal representation length, retaining requested order, duplicates, unsatisfied members and half-open spans. No coalescing, server preconditions, fetching or response transmission.

Choose for: Inspect bounded Range syntax and exact byte spans even when only a large representation length is available

Outside this profile: No remote fetching, request transmission, filesystem access, caching, content decoding or authenticity verification No server policy, method, conditional request or If-Range enforcement; callers must check applicability separately Not a full HTTP parser: unsupported units, empty list members, inner whitespace and numbers over 20 digits are rejected by this bounded profile

Proposed nominal USD 0.004 per successful call, excluding payer wallet/network fees. Protocol definitions: x402, mpp. Static exact contract

Compose HTTP byte-range bodies

Compose exact inert single-range or multipart/byteranges 206 bodies, or an empty 416 artifact, from supplied nonempty Base64 bytes and a strict Range field. Byte-preserving order, offsets, fields and SHA-256; no conditional-request checks or transmission.

Choose for: Create bounded partial-content test artifacts from inline bytes without decoding or contacting a server

Outside this profile: No remote fetching, request transmission, filesystem access, caching, content decoding or authenticity verification No server policy, method, conditional request or If-Range enforcement; callers must check applicability separately Not a full HTTP parser: unsupported units, empty list members, inner whitespace and numbers over 20 digits are rejected by this bounded profile Empty representations, media-type parameters, automatic boundary generation or boundary tokens appearing anywhere in selected payloads

Proposed nominal USD 0.006 per successful call, excluding payer wallet/network fees. Protocol definitions: x402, mpp. Static exact contract