Agent Verification Utility
Deterministic JSON evidence checks with signed verification evidence
Offering
- Provider
- agent-economy.kgninja.dev
- Method
- POST
- Offering type
- Api Endpoint
- Transport type
- http
- Category
- Security
- Delivery
- Not provided
- Pricing model
- Not provided
- x402 version
- 2
Endpoint context
- URL
https://agent-economy.kgninja.dev/verify-evidence- MIME type
- Not provided
- First seen
- 2026-10-16T01:50:32.458Z
- Last seen
- Tags
- Verification, JSON, signed-evidence, MCP, Agents
Payment pricing
x402 payment terms are the authoritative price for calling this endpoint.
- Payment option 1
- 0.01 USDC
Atomic price: 10000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
{
"scheme": "exact",
"network": "eip155:8453",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "10000",
"payTo": "0x4D7d842536De9Eb491AE2300126B3CDdE7B0aDE3"
}
]Observed health
- Status
- Healthy
- Latest latency
- 1344 ms
- Average latency
- 1109 ms
- HTTP status
- 204
- Last checked
- Reachability
- 100% over 14 checks
Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.
Input schema
{
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"precheck_receipt_digest": {
"pattern": "^sha256:[a-f0-9]{64}$",
"type": "string"
},
"request": {
"additionalProperties": false,
"properties": {
"assertions": {
"items": {
"oneOf": [
{
"additionalProperties": false,
"properties": {
"expected_hex": {
"pattern": "^[a-f0-9]{64}$",
"type": "string"
},
"op": {
"const": "sha256_equals",
"type": "string"
}
},
"required": [
"op",
"expected_hex"
],
"type": "object"
},
{
"additionalProperties": false,
"properties": {
"op": {
"const": "json_pointer_exists",
"type": "string"
},
"path": {
"maxLength": 512,
"type": "string"
}
},
"required": [
"op",
"path"
],
"type": "object"
},
{
"additionalProperties": false,
"properties": {
"expected": {},
"op": {
"const": "json_pointer_equals",
"type": "string"
},
"path": {
"maxLength": 512,
"type": "string"
}
},
"required": [
"op",
"path",
"expected"
],
"type": "object"
},
{
"additionalProperties": false,
"properties": {
"expected_type": {
"enum": [
"null",
"boolean",
"number",
"string",
"array",
"object"
],
"type": "string"
},
"op": {
"const": "json_type_is",
"type": "string"
},
"path": {
"maxLength": 512,
"type": "string"
}
},
"required": [
"op",
"path",
"expected_type"
],
"type": "object"
}
]
},
"maxItems": 16,
"minItems": 1,
"type": "array"
},
"client_request_id": {
"maxLength": 64,
"minLength": 1,
"pattern": "^[A-Za-z0-9._:-]+$",
"type": "string"
},
"evidence": {
"additionalProperties": false,
"properties": {
"content_base64": {
"contentEncoding": "base64",
"contentMediaType": "application/json",
"maxLength": 87384,
"type": "string"
},
"media_type": {
"const": "application/json",
"type": "string"
}
},
"required": [
"media_type",
"content_base64"
],
"type": "object"
}
},
"required": [
"client_request_id",
"evidence",
"assertions"
],
"type": "object"
},
"spend_policy": {
"additionalProperties": false,
"properties": {
"asset": {
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"max_amount_atomic": {
"maxLength": 16,
"pattern": "^[1-9][0-9]*$",
"type": "string"
},
"network": {
"enum": [
"eip155:84532",
"eip155:8453"
],
"type": "string"
},
"pay_to": {
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"policy_version": {
"const": "agent-economy/precheck-policy/2.0",
"type": "string"
}
},
"required": [
"policy_version",
"max_amount_atomic",
"network",
"asset",
"pay_to"
],
"type": "object"
}
},
"required": [
"request",
"spend_policy",
"precheck_receipt_digest"
],
"type": "object"
},
"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 schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"precheck_receipt_digest": {
"pattern": "^sha256:[a-f0-9]{64}$",
"type": "string"
},
"request": {
"additionalProperties": false,
"properties": {
"assertions": {
"items": {
"oneOf": [
{
"additionalProperties": false,
"properties": {
"expected_hex": {
"pattern": "^[a-f0-9]{64}$",
"type": "string"
},
"op": {
"const": "sha256_equals",
"type": "string"
}
},
"required": [
"op",
"expected_hex"
],
"type": "object"
},
{
"additionalProperties": false,
"properties": {
"op": {
"const": "json_pointer_exists",
"type": "string"
},
"path": {
"maxLength": 512,
"type": "string"
}
},
"required": [
"op",
"path"
],
"type": "object"
},
{
"additionalProperties": false,
"properties": {
"expected": {},
"op": {
"const": "json_pointer_equals",
"type": "string"
},
"path": {
"maxLength": 512,
"type": "string"
}
},
"required": [
"op",
"path",
"expected"
],
"type": "object"
},
{
"additionalProperties": false,
"properties": {
"expected_type": {
"enum": [
"null",
"boolean",
"number",
"string",
"array",
"object"
],
"type": "string"
},
"op": {
"const": "json_type_is",
"type": "string"
},
"path": {
"maxLength": 512,
"type": "string"
}
},
"required": [
"op",
"path",
"expected_type"
],
"type": "object"
}
]
},
"maxItems": 16,
"minItems": 1,
"type": "array"
},
"client_request_id": {
"maxLength": 64,
"minLength": 1,
"pattern": "^[A-Za-z0-9._:-]+$",
"type": "string"
},
"evidence": {
"additionalProperties": false,
"properties": {
"content_base64": {
"contentEncoding": "base64",
"contentMediaType": "application/json",
"maxLength": 87384,
"type": "string"
},
"media_type": {
"const": "application/json",
"type": "string"
}
},
"required": [
"media_type",
"content_base64"
],
"type": "object"
}
},
"required": [
"client_request_id",
"evidence",
"assertions"
],
"type": "object"
},
"spend_policy": {
"additionalProperties": false,
"properties": {
"asset": {
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"max_amount_atomic": {
"maxLength": 16,
"pattern": "^[1-9][0-9]*$",
"type": "string"
},
"network": {
"enum": [
"eip155:84532",
"eip155:8453"
],
"type": "string"
},
"pay_to": {
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"policy_version": {
"const": "agent-economy/precheck-policy/2.0",
"type": "string"
}
},
"required": [
"policy_version",
"max_amount_atomic",
"network",
"asset",
"pay_to"
],
"type": "object"
}
},
"required": [
"request",
"spend_policy",
"precheck_receipt_digest"
],
"type": "object"
},
"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": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}