{"slug":"402-com-tr-api-x402-b20-metadata-d919aa","title":"🆕 A B20 with a METADATA_ROLE holder can call updateName/updateSymbol — change it","host":"402.com.tr","method":"GET","resource":"https://402.com.tr/api/x402/b20-metadata","category":"market","description":"🆕 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 (","price_listed":0.04,"price_asked":0.04,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":718,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:137","eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","pathParams":{},"queryParams":{"address":"0xb20000000000000000000186a08e781c38059eec"},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"method":{"enum":["GET"],"type":"string"},"pathParams":{"type":"object"},"queryParams":{"properties":{"address":{"description":"B20 token address","type":"string"}},"required":["address"],"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-09-24","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.04,"price_match":true,"latency_ms":718,"error":null}],"description_full":"🆕 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.","last_updated":"2026-09-10T03:01:07.862Z","schemes":["exact"]}