# CoinOpSelect Intent Quote API

> CoinOpSelect Intent Quote 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).

Returns a fill quote and query result for a token swap intent, given buy/sell token symbols and pricing parameters, paid via x402 on Base.

## Facts

- Endpoint: GET https://coinop.publicvm.com/api/v1/intent/quote?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-intent-quote-api-5d16a976
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ftI7-e_cgQS_YyCYQt5oy

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-intent-quote-api-5d16a976
```

Example prompt: Get me an intent quote on CoinOpSelect to buy ETH and sell USDC, with a fill price of 3200 and a limit price of 3250.

## When to prefer this

Use this endpoint when you need an on-chain intent-based swap quote specifically on Base, paid per-call via x402 micropayments in USDC. Prefer this over general DEX aggregators when you want programmatic, agent-friendly quote retrieval with minimal overhead and pay-as-you-go pricing without API key management.

## Known failure modes

- Missing required 'type' or 'method' fields in input object returns a 400 validation error
- Invalid or unsupported token symbols for buy/sell may return empty fill or error
- Payment not received via x402 (HTTP 402) blocks access to the endpoint
- Fill price or limit price formatted as non-numeric string may cause computation error
- Network or blockchain data unavailability may cause delayed or failed quote responses

## How this service works

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

## Output

Returns a JSON object containing a 'fill' object with swap quote details and a 'query' string confirming the intent type ('intent-quote'). The fill object contains the computed result of the swap intent including pricing and execution data.

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "method": {
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "buy": {
       "type": "string",
       "description": "Buy token symbol"
      },
      "sell": {
       "type": "string",
       "description": "Sell token symbol"
      },
      "fillPrice": {
       "type": "string",
       "description": "Fill price number"
      },
      "limitPrice": {
       "type": "string",
       "description": "Limit price number"
      }
     }
    }
   }
  },
  "output": {
   "type": "object",
   "properties": {
    "fill": {
     "type": "object"
    },
    "query": {
     "type": "string"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "fill": {},
  "query": "intent-quote"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/coinopselect-intent-quote-api-5d16a976/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)