> For the complete documentation index, see [llms.txt](https://docs.solanavibestation.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.solanavibestation.com/developers/solana-rpc/websocket-methods/blocksubscribe.md). # blockSubscribe {% hint style="danger" %} This method is considered unstable and therefore is not supported on our RPC nodes. {% endhint %} ## blockSubscribe — Subscribe to new blocks (UNSUPPORTED on SVS) > \*\*Not available on SVS nodes.\*\* This method is considered unstable in Agave/Solana and is therefore not enabled on our RPC infrastructure. Calls will be rejected. Use an alternative subscription method or polling-based pattern for this use case. Subscribe to receive notification anytime a new block is confirmed or finalized.\ > \*\*Parameters\*\*\ > \ > 0\. \`filter\` (required) — Filter for block subscription (\`all\`, or {mentionsAccountOrProgram: \}).\ > 1\. \`config\` (optional) — Optional configuration object. Every field is optional; omit the entire object to use defaults.
```json {"openapi":"3.0.3","info":{"title":"WebSocket RPC: blockSubscribe","version":"1.0.0"},"tags":[{"name":"Block Subscriptions","description":"WebSocket RPC block subscriptions method."}],"servers":[{"url":"wss://public.rpc.solanavibestation.com","description":"Public WebSocket endpoint (rate-limited)"},{"url":"wss://lite.rpc.solanavibestation.com","description":"Lite tier WebSocket"},{"url":"wss://basic.rpc.solanavibestation.com","description":"Basic tier WebSocket"},{"url":"wss://ultra.rpc.solanavibestation.com","description":"Ultra tier WebSocket"},{"url":"wss://elite.rpc.solanavibestation.com","description":"Elite tier WebSocket"},{"url":"wss://epic.rpc.solanavibestation.com","description":"Epic tier WebSocket"}],"security":[{},{"AuthHeader":[]},{"URLParameter":[]}],"components":{"securitySchemes":{"AuthHeader":{"type":"apiKey","in":"header","name":"Authorization","description":"Pass `Authorization: ` on each request."},"URLParameter":{"type":"apiKey","in":"query","name":"api_key","description":"Pass `?api_key=` on the URL."}},"schemas":{"Commitment":{"type":"string","enum":["processed","confirmed","finalized"],"default":"finalized","description":"How finalized a block is at query time:\n- `processed`: most recent block, may be skipped\n- `confirmed`: block confirmed by supermajority of cluster\n- `finalized`: block finalized by the cluster (>2/3 stake)"},"Encoding":{"type":"string","enum":["json","jsonParsed","base58","base64","base64+zstd"],"description":"Encoding for transaction or account data."},"TransactionDetails":{"type":"string","enum":["full","accounts","signatures","none"],"description":"Level of transaction detail to return on block queries."},"JsonRpcEnvelope":{"type":"object","required":["jsonrpc","id"],"description":"Base envelope of every JSON-RPC 2.0 response.","properties":{"jsonrpc":{"type":"string","enum":["2.0"]},"id":{"oneOf":[{"type":"string"},{"type":"integer"}],"description":"Echoed request id."}}},"JsonRpcErrorResponse":{"type":"object","required":["jsonrpc","id","error"],"description":"JSON-RPC 2.0 error response.","properties":{"jsonrpc":{"type":"string","enum":["2.0"]},"id":{"oneOf":[{"type":"string"},{"type":"integer"}]},"error":{"$ref":"#/components/schemas/JsonRpcError"}}},"JsonRpcError":{"type":"object","required":["code","message"],"description":"Structured JSON-RPC error.","properties":{"code":{"type":"integer","description":"Numeric error code per JSON-RPC 2.0 spec. Common values:\n- `-32700` Parse error\n- `-32600` Invalid Request\n- `-32601` Method not found\n- `-32602` Invalid params\n- `-32603` Internal error\n- `-32003` Unauthorized\n- `-32005` Too Many Requests\n- `-32015` Transaction version not supported\n"},"message":{"type":"string"},"data":{"type":"object","additionalProperties":true}}}},"responses":{"UnauthorizedError":{"description":"Authentication required or invalid.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/JsonRpcErrorResponse"}}}},"ForbiddenError":{"description":"Insufficient permissions for the request.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/JsonRpcErrorResponse"}}}},"TooManyRequestsError":{"description":"Rate limit exceeded for this tier.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/JsonRpcErrorResponse"}}}},"InternalServerError":{"description":"Unexpected server error.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/JsonRpcErrorResponse"}}}}}},"paths":{"/":{"post":{"operationId":"blockSubscribe","summary":"blockSubscribe — Subscribe to new blocks (UNSUPPORTED on SVS)","tags":["Block Subscriptions"],"description":"**Not available on SVS nodes.** This method is considered unstable in Agave/Solana and is therefore not enabled on our RPC infrastructure. Calls will be rejected. Use an alternative subscription method or polling-based pattern for this use case. Subscribe to receive notification anytime a new block is confirmed or finalized.\n**Parameters**\n\n0. `filter` (required) — Filter for block subscription (`all`, or {mentionsAccountOrProgram: }).\n1. `config` (optional) — Optional configuration object. Every field is optional; omit the entire object to use defaults.\n","requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","required":["jsonrpc","id","method","params"],"properties":{"jsonrpc":{"type":"string","enum":["2.0"],"description":"JSON-RPC protocol version."},"id":{"oneOf":[{"type":"string"},{"type":"integer"}],"description":"Request identifier echoed back in the response."},"method":{"type":"string","enum":["blockSubscribe"],"description":"Must be `blockSubscribe`."},"params":{"type":"array","description":"Positional parameters. Each item below corresponds to one position in the array, in order.","minItems":1,"maxItems":2,"items":{"anyOf":[{"title":"filter","type":"object","description":"Subscription filter.","additionalProperties":true},{"title":"config (optional)","type":"object","description":"Optional configuration object. Every field is optional; omit the entire object to use defaults.","properties":{"commitment":{"$ref":"#/components/schemas/Commitment"},"minContextSlot":{"type":"integer","format":"int64","description":"Minimum slot at which the request can be evaluated. The RPC node will reject the request with a `MinContextSlotNotReached` error if its current root is below this value. Use this for read-after-write consistency in multi-step workflows."},"encoding":{"$ref":"#/components/schemas/Encoding"},"transactionDetails":{"$ref":"#/components/schemas/TransactionDetails"},"showRewards":{"type":"boolean","description":"Include block-level rewards."},"maxSupportedTransactionVersion":{"type":"integer","format":"int64","description":"Highest transaction version the client can handle."}}}]}}}}}}},"responses":{"200":{"description":"Successful `blockSubscribe` response.","content":{"application/json":{"schema":{"allOf":[{"$ref":"#/components/schemas/JsonRpcEnvelope"},{"type":"object","required":["result"],"properties":{"result":{"type":"integer","format":"int64","description":"Subscription id. Save this value to call the matching unsubscribe method later."}}}]}}}},"401":{"$ref":"#/components/responses/UnauthorizedError"},"403":{"$ref":"#/components/responses/ForbiddenError"},"429":{"$ref":"#/components/responses/TooManyRequestsError"},"500":{"$ref":"#/components/responses/InternalServerError"}}}}}} ``` --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.solanavibestation.com/developers/solana-rpc/websocket-methods/blocksubscribe.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.