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402.com.tr B20 Token Metadata Reader
x402
402.com.tr B20 Token Metadata Reader is a paid API for AI agents from 402.com.tr, paid per call via x402, $0.04/call, status unknown (last checked 2026-09-14).
Reads on-chain metadata for a B20 token including name, symbol, mutability status, and rename history to detect impersonation or bait-and-switch risks
Price / call$0.04
Success—
StatusUnknown
How this service works
🆕 A B20 with a METADATA_ROLE holder can call updateName/updateSymbol — change its own identity after launch (an impersonation / bait-and-switch vector ERC-20 has no protocol equivalent for). Reads whether the metadata is mutable (role holder exists) AND whether it has ALREADY been renamed on-chain (NameUpdated/SymbolUpdated history). Trust the address, not the label.
Output
Returns the current name and symbol of the B20 token, whether the metadata is mutable (presence of a METADATA_ROLE holder), and the full on-chain history of NameUpdated and SymbolUpdated events so the agent can detect if the token has ever been renamed since deployment.
Example use cases
Example prompt
“Can you check the metadata for B20 token at address 0xAbC123... on Base — specifically whether its name or symbol has ever been changed on-chain and whether anyone holds the METADATA_ROLE that could rename it again?”
Technical details
Endpoint
GEThttps://402.com.tr/api/x402/b20-metadataWhen to prefer
Use this endpoint when you need to verify the identity integrity of a B20 token on Base — specifically to check if its name/symbol have changed since launch (bait-and-switch risk) or if a METADATA_ROLE holder exists who could rename it in the future. Prefer this over generic ERC-20 metadata calls when auditability of rename history and mutability status is required.
Side effects
- Invalid or missing token address returns an error
- Non-B20 ERC-20 address may return partial or empty metadata
- Network errors or RPC unavailability may cause timeouts
- Address that is not a contract returns an error or empty result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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