# Coinbase Crypto Price with Spread

> Coinbase Crypto Price with Spread is a paid API for AI agents from sigtap-outreach-api.sigtap.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Returns Coinbase spot, buy, and sell prices for a cryptocurrency pair along with the spread percentage

## Facts

- Endpoint: GET https://sigtap-outreach-api.sigtap.workers.dev/tools/crypto-price
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/coinbase-crypto-price-with-spread-77d925c8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_avPPbe708-ciu0VhQnvSp

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 coinbase-crypto-price-with-spread-77d925c8
```

Example prompt: What's the current Coinbase spot price for Bitcoin in USD, and what's the buy/sell spread right now?

## When to prefer this

Choose this endpoint when you need live Coinbase-sourced spot, buy, and sell prices with spread for a cryptocurrency pair — particularly useful when comparing transaction costs or building logic that accounts for the bid/ask spread. Prefer this over generic market aggregators when Coinbase pricing specifically is required (e.g., for Coinbase-routed trades).

## Known failure modes

- Invalid or unsupported cryptocurrency symbol returns an error
- Network timeout or Cloudflare Worker outage returns no data
- Currency pair not supported by Coinbase returns 404 or empty result
- Rate limiting may occur under heavy usage

## How this service works

Paid micro-utilities for cold-email outreach agents: domain deliverability audits, cold-email grading, template generation, plus a tools toolbox (hashing, JWT decode, IDs, slugs, JSON, regex, crypto prices, domain age, weather). Paid via x402 (USDC on Base). One signature per call. No keys. FREE CHECK: GET /preview/<paid-path> (same URL with /preview/ prefix) returns a 200 demo sample - verify output shape before paying. PAID CALL: GET the url -> 402 challenge -> sign + retry with X-PAYMENT -> settled on-chain (USDC, Base). Ready-to-paste client: GET /llms.txt section "Pay in one call". Catalog+MCP twin: /llms.txt.

## Output

Returns the Coinbase spot price, buy price (ask), and sell price (bid) for the requested cryptocurrency pair, along with the calculated spread percentage between buy and sell prices — useful for understanding current market rates and transaction cost on Coinbase.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "example": {
  "buy": 67150,
  "pair": "BTC-USD",
  "sell": 67090.1,
  "spot": 67123.45,
  "spread_pct": 0.0893
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/coinbase-crypto-price-with-spread-77d925c8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sigtap-outreach-api.sigtap.workers.dev](https://www.zero.xyz/host/sigtap-outreach-api.sigtap.workers.dev/llms.txt)