# fastapi.online — Coin Search

> fastapi.online — Coin Search is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.0005/call, status down (last checked 2026-10-20).

Search for cryptocurrency coins by name or symbol query string

## Facts

- Endpoint: POST https://api.fastapi.online/coin-search?utm_source=zero.xyz
- Price: $0.0005/call
- Payment: x402
- Status: down
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fastapi-online-coin-search-d99f2734
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9a7dcZ0jzFSILfz8IjL8f

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 fastapi-online-coin-search-d99f2734 -d '<json body>'
```

Example prompt: Can you search for coins matching 'ethereum' and tell me what comes back — I need the coin identifiers to use in a price lookup.

## When to prefer this

Use this endpoint when you need to resolve a user-provided coin name or ticker symbol to a canonical coin identifier, especially when building flows that chain into further crypto data lookups. Prefer this over general web search when you need structured, machine-readable coin metadata rather than prose results, and when paying per-call with crypto (no signup) is acceptable.

## Known failure modes

- Empty query string returns no results or an error
- Query with no matching coins returns empty array
- Misspelled or very obscure coin names may return no matches
- Network or server error returns 5xx response
- Missing or invalid payment header returns 402 Payment Required

## How this service works

Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&amp;A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding &amp; crypto utilities, date/time calculators, geo/coordinate math, math &amp; finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key.

## Output

Returns a list of matching cryptocurrency coins for the given query, likely including coin names, symbols, and identifiers that can be used in downstream lookups such as price or market data queries.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "query": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fastapi-online-coin-search-d99f2734/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.fastapi.online](https://www.zero.xyz/host/api.fastapi.online/llms.txt)