# Agent Result Citation Check

> Agent Result Citation 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 citation objects in agent results by checking for required URL and title fields, returning acceptance/rejection status with mismatch reasons and normalized evidence.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/agent-result-citation-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-citation-check-4153ad68
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hqCHHlli8fxuCWlpsreRq

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-citation-check-4153ad68 -d '<json body>'
```

Example prompt: Before I accept and pay for this agent delivery, check whether these 5 citation objects all have valid URL and title fields and that at least 3 citations are present — reject it if anything looks off.

## When to prefer this

Use this endpoint when you need a lightweight, in-memory, stateless check of citation objects before accepting or paying for an x402 agent delivery. Prefer it over manual validation when you need normalized evidence, explicit accept/reject verdicts, and mismatch reasons in a single call without retaining data or calling external providers.

## Known failure modes

- Citations array exceeds 256-item limit — request rejected
- Citation objects exceed 128-property limit — rejected or trimmed
- minimum_count not met — result is rejection with mismatch reasons
- Malformed input structure — schema validation error
- Missing required fields in citation objects — flagged as mismatches with rejection status

## How this service works

Agent Result Citation Check: Agent Result Citation Check checks bounded citation objects for URL and title fields from bounded caller-supplied values without an external provider. Call Agent Result Citation 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 Citation Check as versioned de…

## Output

Returns contract-specific validation checks, normalized citation evidence, a list of mismatch reasons for any failing citations, and an explicit acceptance or rejection status indicating whether the supplied citations meet the required criteria.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "citations": {
   "type": "array",
   "items": {
    "type": "object",
    "maxProperties": 128,
    "additionalProperties": true
   },
   "maxItems": 256,
   "description": "Citations supplied to Agent Result Citation Check; used only for this bounded calculation and processed in memory without retention."
  },
  "minimum_count": {
   "type": "integer",
   "description": "Minimum Count supplied to Agent Result Citation Check; used only for this bounded calculation and processed in memory without retention."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "passed": true,
   "total_count": 1,
   "valid_count": 1,
   "minimum_count": 1
  },
  "schema": "delx/util-agent-result-citation-check/v1",
  "status": "pass",
  "evidence": {
   "retained": false,
   "input_sha256": "f587a82bccbf27d7d465be830d9cd02c7ff7bdd1c8f296f294dbfa2a398f1d00",
   "external_calls": 0
  },
  "operation": "delivery_contract:agent_result_citation_check"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-result-citation-check-4153ad68/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)