# fastapi.online — Stablecoin Information Lookup

> fastapi.online — Stablecoin Information Lookup is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.001/call, status down (last checked 2026-10-13).

Returns information about stablecoins via a self-hosted inference endpoint priced per call with crypto

## Facts

- Endpoint: POST https://api.fastapi.online/stablecoins?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: down
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fastapi-online-stablecoin-information-lookup-134240b1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_id7PJCjl4B4nRvRATXLZO

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-stablecoin-information-lookup-134240b1 -d '<json body>'
```

Example prompt: Can you fetch the latest stablecoin data for me — things like names, symbols, and relevant details about the major stablecoins — using the fastapi.online stablecoins endpoint?

## When to prefer this

Choose this endpoint when you need quick, pay-per-call stablecoin reference data without signing up for a full API account. It is ideal for lightweight, infrequent lookups where a $0.001 USDC micro-payment via x402 is acceptable and no persistent API key is required. Avoid it if you need real-time market prices (use a dedicated financial data API instead) or if you require guaranteed uptime SLAs.

## Known failure modes

- Missing or malformed request body returns 422 Unprocessable Entity
- Insufficient payment (less than $0.001 USDC) results in 402 Payment Required
- Empty body object may cause validation error if underlying model requires specific fields
- Service downtime on self-hosted infrastructure may return 503
- Unknown or unsupported stablecoin query may return empty or null result

## 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 structured data about stablecoins, likely including names, ticker symbols, blockchain networks, and relevant metadata for known stablecoins. Exact response schema is not fully documented but follows the general pattern of the fastapi.online self-hosted inference API.

## 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",
     "required": [],
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fastapi-online-stablecoin-information-lookup-134240b1/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)