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fastapi.online — Token Supply Lookup
x402
fastapi.online — Token Supply Lookup is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-19).
Returns the total token supply for a given contract address on a specified EVM-compatible blockchain network
Price / call$0.001
Success—
StatusUnknown
How this service works
Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding & crypto utilities, date/time calculators, geo/coordinate math, math & 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 the total token supply associated with the given contract address on the specified EVM-compatible chain (ethereum, base, polygon, arbitrum, or optimism), typically as a numeric value representing the on-chain supply figure.
Example use cases
DeFi token supply audit
“Can you check the total token supply for the contract 0x6B175474E89094C44Da98b954EedeAC495271d0F on Ethereum? I want to know how many DAI tokens exist.”
Multi-chain token comparison
“Look up the token supply for contract address 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174 on Polygon — I'm comparing it against the Ethereum version to see if supply is consistent.”
Base network token analysis
“Fetch the total token supply for the contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base so I can calculate the market cap.”
Technical details
Endpoint
POSThttps://api.fastapi.online/token-supply?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, pay-per-call lookup of a token's total supply on a specific EVM chain without setting up your own RPC infrastructure. It supports Ethereum, Base, Polygon, Arbitrum, and Optimism. Prefer this over self-managing RPC calls when you want a simple HTTP API abstraction priced at $0.001 USDC with no signup required.
Side effects
- Invalid or non-existent contract address returns an error or zero
- Unsupported chain value outside the allowed enum returns a validation error
- Contract address not corresponding to a token contract may return zero or an unexpected result
- Network timeouts or RPC node issues may cause delayed or failed responses
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | |
| address | string |
Tags
x402
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