# CoinOpSelect Subscription Flow API

> CoinOpSelect Subscription Flow API is a paid API for AI agents from coinop.publicvm.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-21).

Retrieves subscription flow data (fixed and monthly pricing tiers) for on-chain blockchain data services paid via x402 on Base.

## Facts

- Endpoint: GET https://coinop.publicvm.com/api/v1/subscription/flow?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/coinopselect-subscription-flow-api-1051b6d9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_R1OBan2xZVY_aHJvNgZBj

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 coinopselect-subscription-flow-api-1051b6d9
```

Example prompt: Can you pull up the subscription flow details for CoinOpSelect, specifically the fixed and monthly pricing options for the wallet data method?

## When to prefer this

Use this endpoint when you need to programmatically retrieve subscription plan details and pricing tiers (fixed vs monthly) for CoinOpSelect's on-chain data services before committing to a payment flow; prefer it over manual documentation lookup when an agent needs to dynamically resolve pricing options at runtime.

## Known failure modes

- Missing required 'type' or 'method' input fields returns a validation error
- Invalid method name may return an empty flow object or 404
- Payment via x402 not completed results in a 402 Payment Required response
- Network or host availability issues on publicvm.com may cause timeouts
- Unsupported queryParam values may silently return empty pricing strings

## How this service works

Paid on-chain token, wallet, contract and research data over x402 on Base.

## Output

Returns a JSON object containing a 'flow' object describing the subscription structure and a 'query' string identifier (e.g. 'subscription-flow') confirming the type of data returned.

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "method": {
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "fixed": {
       "type": "string",
       "description": "Fixed cost string"
      },
      "monthly": {
       "type": "string",
       "description": "Monthly amount string"
      }
     }
    }
   }
  },
  "output": {
   "type": "object",
   "properties": {
    "flow": {
     "type": "object"
    },
    "query": {
     "type": "string"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "flow": {},
  "query": "subscription-flow"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/coinopselect-subscription-flow-api-1051b6d9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from coinop.publicvm.com](https://www.zero.xyz/host/coinop.publicvm.com/llms.txt)