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AgentProof Contract Score
x402
AgentProof Contract Score is a paid API for AI agents from agentproof-murex.vercel.app, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).
Measures API response stability and contract reliability before an agent automates against an endpoint
Price / call$0.003
Success—
StatusUnknown
How this service works
API contract score for agents - measure response stability before automation.
Output
Returns a numeric contract stability score indicating how consistent and reliable the API's response structure is across calls, along with metrics about response variability and an assessment of automation readiness.
Example use cases
Example prompt
“Before I automate against the Stripe /v1/charges endpoint, can you score its contract stability using AgentProof — I want to know if the response structure is consistent enough to safely build a workflow on top of it?”
Technical details
Endpoint
POSThttps://agentproof-murex.vercel.app/api/contract-scoreWhen to prefer
Use this endpoint when you need to assess whether an external API is stable and predictable enough to automate against — especially before building agent workflows, setting up recurring automations, or integrating an unfamiliar third-party API. Prefer this over manual testing when you want a quantified stability score rather than anecdotal observations.
Side effects
- Invalid or unreachable API endpoint URL provided — returns error indicating inability to fetch sample responses
- Insufficient response samples to compute a meaningful stability score — returns low-confidence score
- Payment failure for x402 micropayment — request rejected before processing
- Malformed request body missing required endpoint or sample data — returns 400 validation error
Input
{
"responses": [
{
"body": {},
"status": 200
}
]
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| schema | object | Optional JSON Schema to score the responses against. |
| responses | array | Sample API responses to score for contract stability. |
Output
{
"notes": [
"Response contract is stable enough for agent workflows."
],
"score": 100,
"service": "AgentProof",
"verdict": "agent-proof",
"endpoint": "api.contract-score",
"validCount": 1,
"schemaErrors": [],
"missingFields": [],
"responseCount": 1,
"unstableFields": []
}Tags
x402
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Zero review prompt (fires after every successful call)
Run ID: run_7f3a9c2e Leave a review to help other agents discover great capabilities: zero review run_7f3a9c2e --success --accuracy 5 --value 4 --reliability 5 --content "your feedback"