JSON Schema Verifier
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MediaLiveeip155:8453Exactvia cdp
Json-schemaJsonschemaSchema-validationData-validationValidation
Calls · 30d
1
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 3 snapshots so far.
$0.04
Verified settled volume
2 settlements proven x402 by their on-chain EIP-3009 marker.
$0.020
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-09-22 00:48Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x42a3c399f83BCcC3b9eEf81e65954a715D54855EThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.02USDC≈ $0.02 USD
on Base · exact scheme
Pay 0.02 USDC on Base to 0x42a3…4855E. The signed payment is good for 5 minutes.
- Paid to
- 0x42a3…4855E
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 20000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x42a3c399f83BCcC3b9eEf81e65954a715D54855E",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"task_id": "example-task-001",
"expected_schema": {
"type": "object",
"required": [
"name"
],
"properties": {
"name": {
"type": "string"
}
}
},
"submitted_output": {
"name": "Alice"
}
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"flags": [],
"errors": [],
"result": "pass",
"task_id": "example-task-001",
"attestation": {
"algorithm": "Ed25519",
"signature": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==",
"timestamp": "2026-01-01T00:00:00+00:00",
"key_version": "v1-example"
},
"verified_at": "2026-01-01T00:00:00+00:00",
"verifier_version": "0.1.0"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"title": "VerifySchemaRequest",
"required": [
"task_id",
"expected_schema",
"submitted_output"
],
"properties": {
"rules": {
"anyOf": [
{
"type": "array",
"items": {
"type": "object",
"title": "ConsistencyRule",
"required": [
"type",
"field"
],
"properties": {
"type": {
"enum": [
"sum_equals",
"gte",
"lte",
"exists_in",
"unique"
],
"type": "string",
"title": "Type"
},
"field": {
"type": "string",
"title": "Field"
},
"value": {
"anyOf": [
{
"type": "integer"
},
{
"type": "number"
},
{
"type": "string"
},
{
"type": "null"
}
],
"title": "Value",
"default": null
},
"equals": {
"anyOf": [
{
"type": "integer"
},
{
"type": "number"
},
{
"type": "null"
}
],
"title": "Equals",
"default": null
},
"values": {
"anyOf": [
{
"type": "array",
"items": {}
},
{
"type": "null"
}
],
"title": "Values",
"default": null
},
"in_field": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"title": "In Field",
"default": null
},
"tolerance": {
"type": "number",
"title": "Tolerance",
"default": 1e-9,
"minimum": 0
},
"other_field": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"title": "Other Field",
"default": null
},
"equals_field": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"title": "Equals Field",
"default": null
}
},
"description": "One caller-supplied cross-field rule. Paths use dotted keys with '[]'\nas an array wildcard, e.g. 'items[].price' or 'order.total'.\n\n sum_equals: sum of `field` values == `equals_field` value (or `equals`)\n gte / lte: `field` >= / <= `other_field` value (or `value`)\n exists_in: every `field` value is among `in_field` values (or `values`)\n unique: no duplicates among `field` values; if `field` names an\n array itself, no duplicate elements in it"
},
"maxItems": 50
},
{
"type": "null"
}
],
"title": "Rules",
"default": null,
"description": "Optional cross-field rules: sum_equals, gte, lte, exists_in, unique (duplicate detection). Violations are reported as informational flags only."
},
"bounds": {
"anyOf": [
{
"type": "object",
"maxProperties": 50,
"additionalProperties": {
"type": "object",
"title": "Bound",
"properties": {
"max": {
"anyOf": [
{
"type": "integer"
},
{
"type": "number"
},
{
"type": "string"
},
{
"type": "null"
}
],
"title": "Max",
"default": null
},
"min": {
"anyOf": [
{
"type": "integer"
},
{
"type": "number"
},
{
"type": "string"
},
{
"type": "null"
}
],
"title": "Min",
"default": null
}
},
"description": "Optional inclusive min/max for one field. Numbers, or ISO-8601 date /\ndatetime strings (compared as datetimes; naive values are treated as UTC)."
}
},
{
"type": "null"
}
],
"title": "Bounds",
"default": null,
"description": "Optional per-field min/max, keyed by dotted path with '[]' array wildcard (e.g. 'items[].price'). Numbers or ISO-8601 dates. Violations are reported as informational flags only."
},
"task_id": {
"type": "string",
"title": "Task Id"
},
"agent_id": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"title": "Agent Id",
"default": null
},
"expected_schema": {
"type": "object",
"title": "Expected Schema",
"additionalProperties": true
},
"submitted_output": {
"title": "Submitted Output"
},
"strict_content_check": {
"type": "boolean",
"title": "Strict Content Check",
"default": false,
"description": "Opt-in. When true, any string in submitted_output containing control characters (e.g. null bytes) or embedded HTML/script markup makes the result 'fail'. When false (default) this is not checked at all."
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"title": "VerifySchemaResponse",
"required": [
"task_id",
"result",
"errors",
"verified_at",
"verifier_version",
"attestation"
],
"properties": {
"flags": {
"type": "array",
"items": {
"type": "object",
"title": "Flag",
"required": [
"check",
"field",
"detail"
],
"properties": {
"check": {
"type": "string",
"title": "Check"
},
"field": {
"type": "string",
"title": "Field"
},
"detail": {
"type": "string",
"title": "Detail"
},
"severity": {
"type": "string",
"const": "info",
"title": "Severity",
"default": "info"
}
}
},
"title": "Flags",
"description": "Informational integrity findings (placeholder text, possible truncation, bounds and consistency-rule violations). Never affect 'result'."
},
"errors": {
"type": "array",
"items": {
"type": "string"
},
"title": "Errors"
},
"result": {
"enum": [
"pass",
"fail"
],
"type": "string",
"title": "Result"
},
"task_id": {
"type": "string",
"title": "Task Id"
},
"attestation": {
"type": "object",
"title": "Attestation",
"required": [
"algorithm",
"key_version",
"timestamp",
"signature"
],
"properties": {
"algorithm": {
"type": "string",
"const": "Ed25519",
"title": "Algorithm"
},
"signature": {
"type": "string",
"title": "Signature"
},
"timestamp": {
"type": "string",
"title": "Timestamp"
},
"key_version": {
"type": "string",
"title": "Key Version"
}
},
"description": "Ed25519 signature over this response (every field above) plus the timestamp and key_version. The timestamp is this service's own clock, not an externally verified one. Public key and verification steps: /.well-known/agent-card.json, capabilities.extensions (attestation entry)."
},
"verified_at": {
"type": "string",
"title": "Verified At"
},
"verifier_version": {
"type": "string",
"title": "Verifier Version"
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-22 00:48Z
- Last indexed by Roundhouse
- 2026-09-24 09:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-22 01:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 405
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 3 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service JSON Schema Verifier and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=JSON%20Schema%20Verifier' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://fastapi-service-5ag4.onrender.com/verify/schema, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.