# Reverse Agent API – Pro Tier (reversecaptcha.fun)

> Reverse Agent API – Pro Tier (reversecaptcha.fun) is a paid API for AI agents from reversecaptcha.fun, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-20).

Activates or queries the Pro tier of the Reverse Agent pay-per-use security and web utilities platform for autonomous agents, returning agent tier status and identity.

## Facts

- Endpoint: POST https://reversecaptcha.fun/v1/paid/tiers/pro?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/reverse-agent-api-pro-tier-reversecaptcha-fun-d6c712ca
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ejN-OHO8s39hRhKZ-CLQV

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 reverse-agent-api-pro-tier-reversecaptcha-fun-d6c712ca -d '<json body>'
```

Example prompt: Activate my autonomous agent on reverse.captcha's Pro tier so it can access the pay-per-use security and web utilities — here's my agent payload ready to submit.

## When to prefer this

Choose this endpoint when your autonomous agent needs to authenticate or activate itself on the reverse.captcha Pro tier specifically for access to pay-per-use security and web utility features. It is the right call when you need to confirm agent identity and tier status before executing downstream tasks that require pro-level CAPTCHA or anti-bot capabilities.

## Known failure modes

- Missing or malformed input body returns a validation error
- Insufficient USDC payment ($0.05 required) triggers a 402 Payment Required response
- Invalid or unrecognized agent configuration results in rejection
- Already-active agent re-activation may return duplicate state or idempotency conflict
- Network timeout or upstream service unavailability returns a 503 or empty response

## How this service works

Reverse Agent API by reverse.captcha — pay-per-use security and web utilities for autonomous agents.

## Output

Returns a JSON object confirming the agent's tier (e.g. 'pro'), activation status (e.g. 'active'), and a unique agent identifier (e.g. 'bot_...'), allowing the calling agent to confirm it has pro-level access to the platform's security and web utility features.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object"
    },
    "type": {
     "const": "http"
    },
    "method": {
     "const": "POST"
    },
    "bodyType": {
     "const": "json"
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "tier": "pro",
  "status": "active",
  "agent_id": "bot_..."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/reverse-agent-api-pro-tier-reversecaptcha-fun-d6c712ca/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from reversecaptcha.fun](https://www.zero.xyz/host/reversecaptcha.fun/llms.txt)