# Agent Result Provenance Check

> Agent Result Provenance Check is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).

Validates the provenance of an agent result by checking its source, observation time, and collection method, returning acceptance or rejection status with normalized evidence and mismatch reasons.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/agent-result-provenance-check
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-result-provenance-check-a340cecc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pXE8623EGVwk5uWSSRMW1

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability agent-result-provenance-check-a340cecc -d '<json body>'
```

Example prompt: Before I pay for this agent delivery, check the provenance metadata — source, observed time, and collection method — and tell me whether to accept or reject it based on what's mismatched or verified.

## When to prefer this

Choose this endpoint when you need to gate acceptance of an agent-delivered result on verifiable provenance before settling an x402 payment or triggering a downstream workflow. It is purpose-built for agentic result validation where source, observation time, and method must be checked against bounded caller-supplied values without external lookups, making it lightweight and fast. Prefer this over manual inspection when operating in automated agent pipelines where trust decisions must be auditable and normalized.

## Known failure modes

- Provenance object exceeds 128 properties — rejected with validation error
- Missing or malformed observed time field — may result in rejection with mismatch reason
- Unknown or unsupported collection method — flagged in mismatch reasons
- Empty provenance object — may produce rejection with insufficient evidence
- Payment not included or underpaid — x402 payment required error

## How this service works

Agent Result Provenance Check: Agent Result Provenance Check checks result provenance for source, observed time, and method from bounded caller-supplied values without an external provider. Call Agent Result Provenance Check before paying for or accepting an x402 or agent delivery assembled from caller-supplied challenge and result metadata. Returns contract-specific checks, normalized evidence, mismatch reasons, and an explicit acceptance or rejection status for Agent Result Provenance Check a…

## Output

Returns a structured response with contract-specific validation checks, normalized evidence derived from the provenance fields, a list of mismatch reasons if any discrepancies are found, and an explicit acceptance or rejection status indicating whether the agent result should be trusted or rejected.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "provenance": {
   "type": "object",
   "description": "Provenance supplied to Agent Result Provenance Check; used only for this bounded calculation and processed in memory without retention.",
   "maxProperties": 128,
   "additionalProperties": true
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "missing_fields": [],
   "provenance_present": true
  },
  "schema": "delx/util-agent-result-provenance-check/v1",
  "status": "pass",
  "evidence": {
   "retained": false,
   "input_sha256": "0e9f76fd45b6b4e6392d9b4ea5720e2bda3cfc3d637149ab1fae8195b1ff6dad",
   "external_calls": 0
  },
  "operation": "delivery_contract:agent_result_provenance_check"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-result-provenance-check-a340cecc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)