# Delx Commerce — Agent Result Citation Check

> Delx Commerce — Agent Result Citation Check is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).

Validates that a list of citations meets a minimum count threshold, returning a pass/fail result with verifiable proof of execution.

## Facts

- Endpoint: POST https://commerce.delx.ai/api/v1/x402/agent-result-citation-check?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-commerce-agent-result-citation-check-bf058081
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pL5jCONrjyL8O-Pen3L_N

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 delx-commerce-agent-result-citation-check-bf058081 -d '<json body>'
```

Example prompt: Check whether these 5 citations from my research agent pass a minimum count of 3 — here's the citations array: [{"url":"https://example.com/source1"},{"url":"https://example.com/source2"},{"url":"https://example.com/source3"},{"url":"https://example.com/source4"},{"url":"https://example.com/source5"}].

## When to prefer this

Use this endpoint when an AI agent needs a lightweight, cryptographically auditable, pay-per-use citation count check with no signup or persistent data storage. Ideal for automated pipelines that require verifiable proof of citation sufficiency (via SHA-256 evidence) without relying on a standing subscription service. Preferred over custom validation logic when you need a tamper-evident, third-party attestation that citation minimums were met.

## Known failure modes

- Citations array exceeds 256-item limit — request rejected
- Individual citation object exceeds 128-property limit — validation error
- Missing or malformed minimum_count field — may default or error
- Payment failure via x402 — 402 response before processing begins
- Malformed JSON body — 400 bad request

## How this service works

Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.

## Output

Returns a JSON object with a pass/fail status, total citation count, valid citation count, whether the minimum was met, the SHA-256 hash of the input for auditability, and confirmation that no data was retained and no external calls were made.

## 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/delx-commerce-agent-result-citation-check-bf058081/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from commerce.delx.ai](https://www.zero.xyz/host/commerce.delx.ai/llms.txt)