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.
protocol-assurance · Operation ID: http-link-parse
Choose this operation when
- 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
Exact release references
Static JSON contract · Markdown reference · Fixed example response
Complete input schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"properties": {
"headerValues": {
"maxItems": 20,
"type": "array",
"items": {
"type": "string",
"maxLength": 16000
}
}
},
"required": [
"headerValues"
],
"additionalProperties": false
}
Complete output-envelope schema
{
"type": "object",
"required": [
"operation",
"version",
"result",
"provenance"
],
"properties": {
"operation": {
"const": "http-link-parse",
"type": "string"
},
"version": {
"const": "0.29.0",
"type": "string"
},
"result": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"properties": {
"profile": {
"type": "string",
"const": "http-link-framing-subset-v1"
},
"links": {
"maxItems": 200,
"type": "array",
"items": {
"type": "object",
"properties": {
"target": {
"type": "string"
},
"relations": {
"type": "array",
"items": {
"type": "string"
}
},
"anchor": {
"type": [
"string",
"null"
]
},
"usableWithoutAnchor": {
"type": "boolean"
},
"parameters": {
"type": "array",
"items": {
"type": "object",
"properties": {
"name": {
"type": "string"
},
"value": {
"type": [
"string",
"null"
]
}
},
"required": [
"name",
"value"
],
"additionalProperties": false
}
}
},
"required": [
"target",
"relations",
"anchor",
"usableWithoutAnchor",
"parameters"
],
"additionalProperties": false
}
},
"supported": {
"type": "boolean"
},
"valid": {
"type": [
"boolean",
"null"
]
},
"findings": {
"maxItems": 150,
"type": "array",
"items": {
"type": "object",
"properties": {
"code": {
"type": "string"
},
"severity": {
"type": "string",
"enum": [
"error",
"warning",
"unsupported"
]
},
"path": {
"type": "string"
},
"message": {
"type": "string"
}
},
"required": [
"code",
"severity",
"path",
"message"
],
"additionalProperties": false
}
},
"findingCount": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"truncated": {
"type": "boolean"
}
},
"required": [
"profile",
"links",
"supported",
"valid",
"findings",
"findingCount",
"truncated"
],
"additionalProperties": false
},
"provenance": {
"type": "object",
"required": [
"inputSha256",
"outputSha256",
"deterministic",
"externalRequests"
],
"properties": {
"inputSha256": {
"type": "string",
"pattern": "^[a-f0-9]{64}$"
},
"outputSha256": {
"type": "string",
"pattern": "^[a-f0-9]{64}$"
},
"deterministic": {
"const": true
},
"externalRequests": {
"const": 0
}
}
}
},
"additionalProperties": false
}
Fixed example
One accepted fixed example, not a custom-input trial. No operation runs when this static page is requested.
Example input
{
"headerValues": [
"</items?page=2>; rel=\"next\"; title=\"More, items\", </items?page=5>; rel=\"last\""
]
}
Example response
{
"operation": "http-link-parse",
"version": "0.29.0",
"result": {
"profile": "http-link-framing-subset-v1",
"links": [
{
"target": "/items?page=2",
"relations": [
"next"
],
"anchor": null,
"usableWithoutAnchor": true,
"parameters": [
{
"name": "rel",
"value": "next"
},
{
"name": "title",
"value": "More, items"
}
]
},
{
"target": "/items?page=5",
"relations": [
"last"
],
"anchor": null,
"usableWithoutAnchor": true,
"parameters": [
{
"name": "rel",
"value": "last"
}
]
}
],
"supported": true,
"valid": true,
"findings": [],
"findingCount": 0,
"truncated": false
},
"provenance": {
"inputSha256": "936f87f1083a7b82908769f15bbc84a30bcf31f5740b62694bb1b5048d718db6",
"outputSha256": "fb895fa83b3582836a18817d4a453dd54e0907b079388c204ad7d5fe27ed7b17",
"deterministic": true,
"externalRequests": 0
}
}
Bounds and precision
JavaScript IEEE-754 numbers; use strings for large integer IDs/exact decimals where the schema accepts strings. No lossless numeric parsing.
{
"global": {
"requestBytes": 131072,
"responseBytes": 524288,
"jsonDepth": 32,
"jsonNodes": 20000,
"requestsPerMinute": 60,
"paidAttemptsPerMinute": 20,
"idempotencyHours": 24
},
"operation": {
"inputBytes": 100000,
"outputBytes": 400000,
"jsonNodes": 12000,
"depth": 20,
"findings": 150,
"findingJsonBytes": 300000,
"headerFields": 20,
"fieldCharacters": 16000,
"links": 200,
"parametersPerLink": 50
}
}
Complete schemas, descriptions and cross-field validation may impose additional limits.
Proposed price and protocol definitions
{
"unit": "one successful operation call",
"proposedNominalUsd": "0.005",
"sixDecimalTokenBaseUnits": "5000",
"subscription": false,
"includesPayerWalletOrNetworkFees": false,
"liveQuoteVerified": false,
"condition": "Actual SDK challenge is authoritative only within the caller's explicit authorization; configured six-decimal token peg is an operator assertion, not a conversion guarantee."
}
Protocol definitions: x402, mpp. MPP uses Tempo charge. Paid MCP execution is unsupported. All runtime readiness is not evaluated in this build.
API path templates, not endpoints on this documentation host
{
"x402": "/v1/x402/http-link-parse",
"mpp": "/v1/mpp/http-link-parse"
}
Required headers
{
"Content-Type": "application/json",
"Idempotency-Key": "random 16–128 character operation identifier"
}
Actual SDK challenge amount, asset, network, recipient and wallet costs must pass independent authorization. Preserve identical key, body, protocol and credential on retries; on PAYMENT_UNCERTAIN stop and reconcile.
Execution profile and provider conditions
{
"deterministic": true,
"externalRequests": 0,
"maxExternalRequests": 0,
"resultSnapshotPersisted": false,
"fixedExampleIsIllustrativeSnapshot": false,
"requiresPayment": true,
"supportsMcpExecution": false
}
Deterministic supplied-input operation with no external requests or stored request/result bodies. Payment infrastructure retains payment metadata and hashes.
Failure handling
- HTTP 400: Malformed JSON, missing/invalid idempotency key, or payment identifier mismatch Correct the request before payment
- HTTP 402: Payment challenge or rejected payment Use official protocol SDK; inspect payment outcome before another payment
- HTTP 409: Idempotency conflict, duplicate proof, or PAYMENT_UNCERTAIN Keep original key, body, and proof; reconcile uncertainty with operator; never blindly repay
- HTTP 413: Input or generated output too large Reduce input; no payment attempted for validation failure
- HTTP 415: Unsupported media type or compression Send uncompressed application/json
- HTTP 422: Schema or service-specific semantic validation failure Correct input using returned error code; no payment attempted
- HTTP 429: Request/payment-attempt rate exceeded Wait for rate limit window; preserve existing payment identity
- HTTP 503: Payment configuration/provider/state unavailable, or live DNS preparation failed before settlement Check readiness; DNS preparation failures may retry the identical key/body/credential only; uncertainty requires reconciliation
Declared requirements
Before any paid call, refresh the live operation contract and POST the complete bounded budgeted plan to the separate API's /preflight. Unknown requirements block selection; compatible preflight is not permission to spend.