Count-bound Merkle artifact bundle
Compose a local SHA-256 Merkle content commitment binding exact IDs, bytes and item count, plus selected shape-aware inclusion paths. This is consistency with a separately trusted root, not identity, signature, authenticity, confidentiality, completeness, timestamp or file-safety verification.
structured · Operation ID: merkle-bundle-compose
Choose this operation when
- Hand off one supplied artifact and its logarithmic inclusion path without resending the full bundle
Outside this profile
- Signatures, certificate transparency, blockchain protocol compatibility, append-only proofs or trusted root distribution
- Authentication, identity, confidentiality, timestamping, safety or complete-item-list verification
- Executing code, writing files, environment changes, network requests, publishing or deployment
Exact release references
Static JSON contract · Markdown reference · Fixed example response
Complete input schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"properties": {
"items": {
"minItems": 1,
"maxItems": 128,
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string",
"minLength": 1,
"maxLength": 100
},
"encoding": {
"type": "string",
"enum": [
"utf8",
"base64"
]
},
"data": {
"type": "string",
"maxLength": 90000
}
},
"required": [
"id",
"encoding",
"data"
],
"additionalProperties": false
}
},
"proofIds": {
"maxItems": 128,
"type": "array",
"items": {
"type": "string",
"minLength": 1,
"maxLength": 100
}
}
},
"required": [
"items",
"proofIds"
],
"additionalProperties": false
}
Complete output-envelope schema
{
"type": "object",
"required": [
"operation",
"version",
"result",
"provenance"
],
"properties": {
"operation": {
"const": "merkle-bundle-compose",
"type": "string"
},
"version": {
"const": "0.29.0",
"type": "string"
},
"result": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"properties": {
"profile": {
"type": "string",
"const": "id-bytes-merkle-sha256-v1"
},
"root": {
"type": "string",
"pattern": "^[a-f0-9]{64}$"
},
"treeHash": {
"type": "string",
"pattern": "^[a-f0-9]{64}$"
},
"itemCount": {
"type": "integer",
"minimum": 1,
"maximum": 128
},
"manifest": {
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string",
"minLength": 1,
"maxLength": 100
},
"index": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"byteLength": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"leafHash": {
"type": "string",
"pattern": "^[a-f0-9]{64}$"
}
},
"required": [
"id",
"index",
"byteLength",
"leafHash"
],
"additionalProperties": false
}
},
"proofs": {
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string",
"minLength": 1,
"maxLength": 100
},
"index": {
"type": "integer",
"minimum": 0,
"maximum": 9007199254740991
},
"itemCount": {
"type": "integer",
"minimum": 1,
"maximum": 128
},
"siblings": {
"maxItems": 7,
"type": "array",
"items": {
"type": "object",
"properties": {
"side": {
"type": "string",
"enum": [
"left",
"right"
]
},
"hash": {
"type": "string",
"pattern": "^[a-f0-9]{64}$"
}
},
"required": [
"side",
"hash"
],
"additionalProperties": false
}
}
},
"required": [
"id",
"index",
"itemCount",
"siblings"
],
"additionalProperties": false
}
},
"externalRequests": {
"type": "number",
"const": 0
},
"authenticityVerified": {
"type": "boolean",
"const": false
}
},
"required": [
"profile",
"root",
"treeHash",
"itemCount",
"manifest",
"proofs",
"externalRequests",
"authenticityVerified"
],
"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
{
"items": [
{
"id": "a",
"encoding": "utf8",
"data": "A"
},
{
"id": "b",
"encoding": "utf8",
"data": "B"
},
{
"id": "c",
"encoding": "base64",
"data": "AP8="
}
],
"proofIds": [
"a"
]
}
Example response
{
"operation": "merkle-bundle-compose",
"version": "0.29.0",
"result": {
"profile": "id-bytes-merkle-sha256-v1",
"root": "4f60c66aed8c8da2fe90771108c10a02951b380ab0c0e5b515c619cc0a8f1d9d",
"treeHash": "d85a25d6b37e6f85dd8eee6489845d06e42c8df14567ca344a8bd833524c6c03",
"itemCount": 3,
"manifest": [
{
"id": "a",
"index": 0,
"byteLength": 1,
"leafHash": "728d8462eee330125f9b80cc67dabc50d2b19be470f4e0db6dae1db8479fd68e"
},
{
"id": "b",
"index": 1,
"byteLength": 1,
"leafHash": "0b17a04d58081b5d3fbbf2b58e132ca9857cb7a806d8b6590df3c498a4e717e3"
},
{
"id": "c",
"index": 2,
"byteLength": 2,
"leafHash": "896c085e5286e008c46dc1219c9508f2f575f0dd667a48af63f8efdcda36fc31"
}
],
"proofs": [
{
"id": "a",
"index": 0,
"itemCount": 3,
"siblings": [
{
"side": "right",
"hash": "0b17a04d58081b5d3fbbf2b58e132ca9857cb7a806d8b6590df3c498a4e717e3"
},
{
"side": "right",
"hash": "896c085e5286e008c46dc1219c9508f2f575f0dd667a48af63f8efdcda36fc31"
}
]
}
],
"externalRequests": 0,
"authenticityVerified": false
},
"provenance": {
"inputSha256": "589ef52b234d843c25226c2fcfa453e7a2980ec2b03514bb6c26acdf277db550",
"outputSha256": "5d213c82d85b14afdd8492030f41aae579136720b2567ff6fb1577714478bca4",
"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,
"items": 128,
"proofs": 128,
"idUnits": 100,
"decodedBytes": 60000,
"treeNodes": 255,
"hashCalls": 256,
"proofSiblings": 7
}
}
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/merkle-bundle-compose",
"mpp": "/v1/mpp/merkle-bundle-compose"
}
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.