Solana RPC HTTP Methods

Solana nodes accept HTTP requests using the JSON-RPC 2.0 specification.

For JavaScript applications, use the @solana/web3.js library as a convenient interface for the RPC methods to interact with a Solana node. For an PubSub connection to a Solana node, use the Websocket API.

RPC HTTP Endpoint

Default port: 8899

• http://localhost:8899
• http://192.168.1.88:8899

Request Formatting

To make a JSON-RPC request, send an HTTP POST request with a Content-Type: application/json header. The JSON request data should contain 4 fields:

• jsonrpc: <string> - set to "2.0"
• id: <string | number | null> - a unique identifier for the request, generated by the client. Typically a string or number, though null is technically allowed but not advised
• method: <string> - a string containing the method to be invoked
• params: <array> - a JSON array of ordered parameter values

Example using curl:

curl https://api.devnet.solana.com -s -X POST -H "Content-Type: application/json" -d '
  {
    "jsonrpc": "2.0",
    "id": 1,
    "method": "getBalance",
    "params": [
      "83astBRguLMdt2h5U1Tpdq5tjFoJ6noeGwaY3mDLVcri"
    ]
  }
'

The response output will be a JSON object with the following fields:

• jsonrpc: <string> - matching the request specification
• id: <number> - matching the request identifier
• result: <array|number|object|string> - requested data or success confirmation

Requests can be sent in batches by sending an array of JSON-RPC request objects as the data for a single POST.

Example Request

The commitment parameter should be included as the last element in the params array:

curl https://api.devnet.solana.com -s -X POST -H "Content-Type: application/json" -d '
  {
    "jsonrpc": "2.0",
    "id": 1,
    "method": "getBalance",
    "params": [
      "83astBRguLMdt2h5U1Tpdq5tjFoJ6noeGwaY3mDLVcri",
      {
        "commitment": "finalized"
      }
    ]
  }
'

Definitions

• Hash: A SHA-256 hash of a chunk of data.
• Pubkey: The public key of a Ed25519 key-pair.
• Transaction: A list of Solana instructions signed by a client keypair to authorize those actions.
• Signature: An Ed25519 signature of transaction's payload data including instructions. This can be used to identify transactions.

Health Check

Although not a JSON RPC API, a GET /health at the RPC HTTP Endpoint provides a health-check mechanism for use by load balancers or other network infrastructure. This request will always return a HTTP 200 OK response with a body of "ok", "behind" or "unknown":

• ok: The node is within HEALTH_CHECK_SLOT_DISTANCE slots from the latest cluster confirmed slot
• behind { distance }: The node is behind distance slots from the latest cluster confirmed slot where distance > HEALTH_CHECK_SLOT_DISTANCE
• unknown: The node is unable to determine where it stands in relation to the cluster