Deterministically evaluates one unsigned Base transaction against the buyer's ex
Deterministically evaluates one unsigned Base transaction against the buyer's exact policy and immutable block anchor before signing, returning a replayable clause-by-clause PASS, FAIL, or ESCALATE receipt. No keys, signatures, custody, signing, or broadcast authority are accepted.
Answeringour last check, 2026-10-03
1 of 1checks answered this week
44 msmedian answer time
$0.03listed price per call
$0.03price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://market.561.group/v1/pre-sign/conformance
| Category | Market data |
|---|---|
| Provider host | market.561.group |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-03 | valid payment request | 402 | $0.03 | 44 ms |
Example input (from the provider)
{
"body": {
"anchor": {
"blockHash": "0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
"blockNumber": "1",
"chainId": 8453,
"type": "ImmutableBaseBlockAnchor"
},
"evidence": [],
"policy": {
"clauses": [
{
"chainId": 8453,
"id": "a-chain",
"type": "ChainIdEquals"
}
],
"type": "BasePreSignPolicy",
"version": 1
},
"receiptProfile": "full-v1",
"transaction": {
"chainId": 8453,
"data": "0x",
"gasLimit": "21000",
"nonce": "0",
"sender": "0x1111111111111111111111111111111111111111",
"to": "0x2222222222222222222222222222222222222222",
"type": "UnsignedBaseTransaction",
"valueWei": "0"
},
"type": "BasePreSignConformanceRequest",
"version": 1
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"anchor": {
"description": "One immutable Base block number and hash.",
"type": "object"
},
"evidence": {
"description": "Deterministic evidence objects cited by policy clauses.",
"type": "array"
},
"policy": {
"description": "The exact deterministic policy clauses to evaluate.",
"type": "object"
},
"receiptProfile": {
"const": "full-v1"
},
"transaction": {
"description": "One unsigned Base transaction; credentials, signatures, signed transactions, custody, signing, and broadcast grants are refused.",
"type": "object"
},
"type": {
"const": "BasePreSignConformanceRequest"
},
"version": {
"const": 1
}
},
"required": [
"type",
"version",
"transaction",
"policy",
"anchor",
"evidence",
"receiptProfile"
]
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"clauseResults": {
"type": "array"
},
"forbiddenEffects": {
"type": "object"
},
"id": {
"type": "string"
},
"type": {
"const": "BasePreSignPolicyConformanceReceipt"
},
"verdict": {
"enum": [
"PASS",
"FAIL",
"ESCALATE"
]
}
},
"required": [
"id",
"type",
"requestDigest",
"transactionDigest",
"policyDigest",
"chain",
"block",
"anchorAssurance",
"engine",
"clauseResults",
"verdict",
"evidenceReferences",
"evidenceAssurance",
"replay",
"forbiddenEffects"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}