# Stablecoin Token Facts Lookup

> Stablecoin Token Facts Lookup is a paid API for AI agents from payments-intel-production.up.railway.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-19).

Returns verified metadata (symbol, name, decimals, contract address, chain, issuer) for major stablecoins on supported chains, with source citations and licenses

## Facts

- Endpoint: GET https://payments-intel-production.up.railway.app/v1/token?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stablecoin-token-facts-lookup-d028ac87
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bkqPSr9csKXlmKBrAT4hj

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 stablecoin-token-facts-lookup-d028ac87
```

Example prompt: What are the contract address, decimals, and issuer for USDC on Base — I need the sourced, verified token facts before sending a payment.

## When to prefer this

Use this endpoint when you need authoritative, citation-backed stablecoin token metadata (contract address, decimals, issuer) for a specific chain before executing payments, building integrations, or verifying on-chain data. Prefer it over general blockchain explorers or web searches when you need structured, machine-readable facts with source provenance for a curated set of major stablecoins (USDC, EURC, USDT, PYUSD, DAI).

## Known failure modes

- 400 returned for malformed chain slug, CAIP-2 id, or token symbol/address
- 404 returned for valid but unsupported token/chain combinations not in the dataset
- Missing required 'chain' query parameter causes 400
- Tokens other than USDC, EURC, USDT, PYUSD, DAI are not in dataset and return 404
- Chains not covered by the dataset return 404

## How this service works

What are the symbol, name, decimals, contract address and issuer of this stablecoin on this chain? Cited stablecoin token facts from a prepared dataset (USDC, EURC, USDT, PYUSD, DAI on the chains /v1/chain covers, where a permissively licensed source lists them): symbol, name, decimals, contract address, chain, issuer, each with a source citation and license. Fields not established from a source are the string "unknown". Malformed input and tokens not in the dataset return 400/404 and are never 

## Output

A structured object with fields: symbol, name, decimals, contract address, chain, and issuer — each accompanied by a source citation and license. Fields not established from a permissively licensed source are returned as the string 'unknown'. Malformed input or tokens not in the dataset return HTTP 400 or 404.

## 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",
     "required": [
      "chain"
     ],
     "properties": {
      "chain": {
       "type": "string",
       "description": "Chain slug, name or CAIP-2 id, e.g. base, solana, eip155:8453"
      },
      "symbol": {
       "type": "string",
       "description": "Stablecoin ticker, e.g. USDC (give symbol or address)"
      },
      "address": {
       "type": "string",
       "description": "Token contract / mint address (give address or symbol)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stablecoin-token-facts-lookup-d028ac87/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from payments-intel-production.up.railway.app](https://www.zero.xyz/host/payments-intel-production.up.railway.app/llms.txt)