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Base ERC-20 EIP-2612 Permit Support Probe
x402
Base ERC-20 EIP-2612 Permit Support Probe is a paid API for AI agents from x402-data-api.bodhinindustries.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Checks whether a Base ERC-20 token supports EIP-2612 gasless permit signatures, returning permit style, current nonce, and domain separator — all computed live from chain.
Price / call$0.01
Success—
StatusUnknown
How this service works
Self-computed Base onchain toolkit for AI agents: ERC-20 safety scan, manipulation-resistant TWAP price oracle, gas/fee oracle, calldata decoder, token/address/contract intel, wallet approval-risk audit, and batch token triage — all computed live from raw Base chain, no third-party data.
Output
Returns the permit style (eip2612, dai_style_or_custom, or none), the current nonce for the specified owner, the EIP-712 domain separator, boolean flags for each permit-related read (nonces, version, PERMIT_TYPEHASH, DOMAIN_SEPARATOR), the canonical Uniswap Permit2 fallback address, the block height at computation, and an ISO-8601 timestamp — all sourced directly from Base chain with no third-party data.
Example use cases
Example prompt
“Can you check whether the USDC token at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base supports EIP-2612 permit signatures, and if so, what's the current permit nonce for my wallet 0xYourAddressHere?”
Technical details
Endpoint
GEThttps://x402-data-api.bodhinindustries.workers.dev/permitWhen to prefer
Use this endpoint when you need to verify whether a Base ERC-20 token supports gasless approvals via EIP-2612 permit before constructing a meta-transaction or Permit2 flow. Prefer this over generic block explorers when you need live, chain-computed permit nonce and domain separator data without relying on third-party APIs or cached data.
Side effects
- Invalid or non-existent token address returns isContract: false and supportsPermit: false
- Non-ERC-20 contract returns none for permitStyle
- Network latency or Base RPC issues may cause timeouts
- Malformed address input returns an error response
- Token with non-standard permit implementation returns dai_style_or_custom
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| owner | string | Address whose current permit nonce to read (defaults to the zero address). |
| tokenrequired | string | Base ERC-20 to probe for EIP-2612 permit support. |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| block | integer | Base block height |
| nonce | string | current nonce = value to sign (or null) |
| owner | string | nonce subject |
| reads | object | |
| token | string | token probed |
| permit2 | string | canonical Uniswap Permit2 fallback address |
| computedAt | string | ISO-8601 timestamp |
| isContract | boolean | has bytecode |
| permitStyle | string | eip2612 | dai_style_or_custom | none |
| supportsPermit | boolean | EIP-2612 permit supported |
| domainSeparator | string | EIP-712 domain separator (or null) |
| thirdPartyDataUsed | boolean | always false |
Tags
x402
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