# Agent Release Gate

> Agent Release Gate is a paid API for AI agents from agentcash-claude-seller-production.up.railway.app, paid per call via x402, $0.015/call, status unknown (last checked 2026-10-31).

Independently evaluates an AI agent's candidate output against user-defined criteria and returns a pass/fail quality verdict with repair instructions when the output falls short.

## Facts

- Endpoint: POST https://agentcash-claude-seller-production.up.railway.app/api/quality-gate?utm_source=zero.xyz
- Price: $0.015/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-release-gate-c122963e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Ad01XYvL1Fe4AN-IMz7_g

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-release-gate-c122963e -d '<json body>'
```

Example prompt: Check whether this draft answer is ready to ship: the task was 'Write a one-paragraph product description for noise-cancelling headphones', the criteria are ['mentions noise cancellation', 'under 100 words', 'ends with a call to action'], and here's the candidate: 'Escape the noise with our premium headphones. Experience crystal-clear audio and all-day comfort. Shop now.' — give me a pass/fail and tell me what to fix if it fails.

## When to prefer this

Choose this endpoint when you need an independent, LLM-powered quality judge that is separate from the agent generating the output — particularly in agentic pipelines where self-evaluation is unreliable. It is ideal for pre-release gates, human-in-the-loop checkpoints, or any workflow where structured pass/fail verdicts with repair instructions are needed before content is published or acted upon. Prefer it over prompt-level self-critique when you want an external, auditable evaluation step with per-call micropayment pricing and no API key setup.

## Known failure modes

- Candidate or task exceeds character limits (8000 and 6000 chars respectively), returning a validation error
- Criteria array is empty or exceeds 8 items, causing a schema rejection
- Payment not received or insufficient USDC/MPP balance, resulting in 402 Payment Required
- Network timeout on Railway-hosted service during high load
- Ambiguous criteria that produce inconsistent gate outcomes
- maxTokens set too low (minimum 64) to fit full repair instructions

## How this service works

Agent Release Gate: an independent quality check that tells an AI agent whether its output is ready to ship, with repair instructions when it is not. Also offers low-cost utilities for quick answers, summaries, task routing, structured JSON extraction, and Claude text generation. Pay per call with USDC over x402 on Base or MPP on Tempo; no API key or signup.

## Output

A structured assessment indicating whether the candidate output passes or fails against the provided criteria, along with specific repair instructions or actionable feedback for any criteria that were not met. Response is capped at the specified maxTokens (64–256).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "task": {
   "type": "string",
   "maxLength": 6000,
   "minLength": 1
  },
  "criteria": {
   "type": "array",
   "items": {
    "type": "string",
    "maxLength": 400,
    "minLength": 1
   },
   "maxItems": 8,
   "minItems": 1
  },
  "candidate": {
   "type": "string",
   "maxLength": 8000,
   "minLength": 1
  },
  "maxTokens": {
   "type": "integer",
   "default": 128,
   "maximum": 256,
   "minimum": 64
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-release-gate-c122963e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentcash-claude-seller-production.up.railway.app](https://www.zero.xyz/host/agentcash-claude-seller-production.up.railway.app/llms.txt)