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Token Oracle – Token Contract Verifier
x402
Token Oracle – Token Contract Verifier is a paid API for AI agents from token-oracle.fly.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-30).
Verifies a token contract address on a given chain by checking it's real, matches the claimed symbol, and that supply figures match CoinGecko — catching hallucinated addresses, impersonation, and tokenomics errors.
Price / call$0.003
Success—
StatusUnknown
How this service works
Checks whether a token contract address is real, matches its claimed symbol, and whether its supply figures match an independent source (CoinGecko) — before trading, coding, or reporting against it. Catches hallucinated/wrong addresses, address-poisoning impersonation, and tokenomics hallucination.
Output
Returns whether the contract address exists and is active on the specified chain, whether its on-chain symbol matches the expected symbol provided, and whether its supply figures are consistent with CoinGecko's independent data — plus flags for hallucinated/wrong addresses, address-poisoning impersonation attempts, and tokenomics discrepancies.
Example use cases
Pre-trade token address safety check
“I'm about to buy some ARB tokens — can you verify that contract address 0x912CE59144191C1204E64559FE8253a0e49E6548 on Arbitrum really is ARB and that the supply looks right according to CoinGecko before I proceed?”
Catching address-poisoning in a DeFi integration
“We're integrating MATIC into our app and someone shared the contract address 0x7D1AfA7B718fb893dB30A3aBc0Cfc608AaCfeBB0 on Ethereum — can you confirm it's the real MATIC, not an impersonator, and that its token supply matches what CoinGecko shows?”
Validating token data for a research report
“I'm writing a report on AVAX tokenomics on Avalanche — can you check that the contract address 0xB31f66AA3C1e785363F0875A1B74E27b85FD66c7 actually matches the AVAX symbol and that its circulating supply aligns with CoinGecko's figures?”
Technical details
Endpoint
POSThttps://token-oracle.fly.dev/verify?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an agent needs to confirm a token contract address is legitimate before executing a trade, writing code against a contract, or publishing tokenomics data — especially when the address came from an LLM output, user input, or an untrusted third party. It uniquely combines on-chain symbol matching with an independent CoinGecko supply cross-check in a single call, making it superior to a plain on-chain lookup when detecting impersonation or hallucination is the primary concern. Supports Ethereum, Base, Arbitrum, Polygon, Optimism, Avalanche, and BSC.
Side effects
- Contract address does not exist on the specified chain — returns invalid/not found
- Symbol mismatch detected — address exists but on-chain symbol differs from expectedSymbol
- CoinGecko has no record of the token — cannot cross-validate supply figures
- Unsupported chain passed — returns validation error for chain not in enum
- Malformed address format — returns parse error before any on-chain lookup
- CoinGecko API unavailable — partial result returned without supply cross-check
- Rate limit or payment failure — 402 or 429 response with no verification data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | |
| address | string | |
| expectedSymbol | string |
Tags
x402
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