> For the complete documentation index, see [llms.txt](https://developer.1moneynetwork.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.1moneynetwork.com/integrations/rest-apis/chains/get-chain-id.md).

# Get Chain Id

## GET /v1/chains/chain\_id

>

```json
{"openapi":"3.1.0","info":{"title":"om-api-rest","version":"0.1.0"},"tags":[{"name":"chains","description":"Chains API"}],"servers":[{"url":"https://api.testnet.1money.network","description":"Testnet API server"},{"url":"https://api.1money.network","description":"Mainnet API server"},{"url":"http://localhost:18555","description":"Local API server"}],"paths":{"/v1/chains/chain_id":{"get":{"tags":["chains"],"operationId":"get_chain_id","responses":{"200":{"description":"","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ChainIdResponse"}}}},"400":{"description":"Client error","content":{"application/json":{"schema":{"$ref":"#/components/schemas/RESTErrorData"}}}},"404":{"description":"Resource not found","content":{"application/json":{"schema":{"$ref":"#/components/schemas/RESTErrorData"}}}},"408":{"description":"Request timeout","content":{"application/json":{"schema":{"$ref":"#/components/schemas/RESTErrorData"}}}},"422":{"description":"Business logic error","content":{"application/json":{"schema":{"$ref":"#/components/schemas/RESTErrorData"}}}},"500":{"description":"Internal server error","content":{"application/json":{"schema":{"$ref":"#/components/schemas/RESTErrorData"}}}}}}}},"components":{"schemas":{"ChainIdResponse":{"type":"object","description":"Response for chain ID endpoint","required":["chain_id"],"properties":{"chain_id":{"type":"integer","format":"int64","description":"The chain ID in decimal format (e.g., \"1212101\")","minimum":0}}},"RESTErrorData":{"type":"object","required":["error_code","message"],"properties":{"error_code":{"type":"string","description":"Structured error code for programmatic handling"},"message":{"type":"string","description":"Human-readable error message"}}}}}}
```