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B20 Permit Inspector · 402.com.tr

🆕 Every B20 has ERC-2612 permit built in, approve a spender by…

🆕 Every B20 has ERC-2612 permit built in, approve a spender by signature instead of a transaction. Reads exactly what an agent needs to build a valid permit: the token's DOMAIN_SEPARATOR, the owner's current nonce (so the signed payload can't be rejected/replayed), and the EIP-712 domain/type struct. Read-only, signs nothing.

Ready now4 calls · 3 buyers in 30 days

Input

B20 token address
Owner wallet (for the nonce, optional)

Sample response

Published by the provider. Your run returns a fresh response.

response7 keys
address"0xb20000000000000000000186a08e781c38059eec"
checkedAt"2026-10-11T17:18:26.333Z"
domainSeparator"0xd4f8bd427e9fce6ac90676c1dbd0a5db5284c1397afa4e5e4a76925c5baac692"
isB20true
nonce"0"
owner"0x973A31858f4D2125f48C880542DA11a2796f12D6"
supportsPermittrue
responseobject, 7 keys
Your agent can do this on its own
Add the MCP URL in Claude Code, Cursor or Codex. Your agent can run Tools within its spending limits, or ask for approval each time. Connect your agent

Connect your agent

Add one MCP URL and your agent can find and run this tool within its spending limits. Choose “Ask each time” if you want to approve every Call.

MCP URL

https://app.aecon.ai/mcp
Terminalbash
claude mcp add --transport http --scope user agentic-economy "https://app.aecon.ai/mcp"

In Claude Code, open /mcp, select agentic-economy, then choose Authenticate.

Track record

Paid calls, last 30 days
4
Buyers, last 30 days
3
Last paid call

Reported by the x402 directory.

A$0.043 per call