> ## Documentation Index
> Fetch the complete documentation index at: https://www.helius.dev/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# getSlotLeaders
> Returns the slot leaders for a given slot range.
## Request Parameters
Starting Solana slot number to begin retrieving the validator schedule from.
Number of consecutive slots to retrieve the scheduled validator identities for (1-5,000).
## OpenAPI
````yaml openapi/rpc-http/getSlotLeaders.yaml POST /
openapi: 3.1.0
info:
title: Solana RPC API
version: 1.0.0
description: >-
Validator schedule projection API for retrieving the upcoming sequence of
Solana validators assigned to produce blocks across multiple future slots.
license:
name: Apache 2.0
url: https://www.apache.org/licenses/LICENSE-2.0.html
servers:
- url: https://mainnet.helius-rpc.com
description: Mainnet RPC endpoint
- url: https://devnet.helius-rpc.com
description: Devnet RPC endpoint
security: []
paths:
/:
post:
tags:
- RPC
summary: getSlotLeaders
description: >
Retrieve the ordered sequence of Solana validators scheduled to produce
blocks for future slots.
This predictive consensus API returns the complete validator rotation
schedule for an upcoming
range of slots, allowing applications to forecast which validators will
be responsible for block
production. Essential for network monitoring dashboards, validator
performance tracking, consensus
visualization tools, and applications that need to anticipate the
upcoming leader schedule.
Supports querying up to 5,000 slots in a single request for efficient
schedule retrieval.
operationId: getSlotLeaders
requestBody:
required: true
content:
application/json:
schema:
type: object
properties:
jsonrpc:
type: string
enum:
- '2.0'
description: The JSON-RPC protocol version.
example: '2.0'
default: '2.0'
id:
type: string
description: A unique identifier for the request.
example: '1'
default: '1'
method:
type: string
enum:
- getSlotLeaders
description: The name of the RPC method to invoke.
example: getSlotLeaders
default: getSlotLeaders
params:
type: array
description: Parameters for specifying the start slot and limit.
default:
- 100
- 10
items:
oneOf:
- type: integer
description: >-
Starting Solana slot number to begin retrieving the
validator schedule from.
example: 100
- type: integer
description: >-
Number of consecutive slots to retrieve the scheduled
validator identities for (1-5,000).
example: 10
examples:
example1:
$ref: '#/components/examples/getSlotLeadersRequest'
responses:
'200':
description: Successfully retrieved slot leaders.
content:
application/json:
schema:
type: object
properties:
jsonrpc:
type: string
description: The JSON-RPC protocol version.
enum:
- '2.0'
example: '2.0'
id:
type: string
description: Identifier matching the request.
example: '1'
result:
type: array
description: >-
Ordered sequence of Solana validator identities scheduled
for upcoming block production.
items:
type: string
description: >-
Solana validator identity (public key) scheduled as
block producer for a specific slot.
example: ChorusmmK7i1AxXeiTtQgQZhQNiXYU84ULeaYF1EH15n
examples:
example1:
$ref: '#/components/examples/getSlotLeadersResponse'
'400':
description: Bad Request - Invalid request parameters or malformed request.
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
example:
jsonrpc: '2.0'
error:
code: -32602
message: Invalid params
id: '1'
'401':
description: Unauthorized - Invalid or missing API key.
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
example:
jsonrpc: '2.0'
error:
code: -32001
message: Unauthorized
id: '1'
'429':
description: Too Many Requests - Rate limit exceeded.
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
example:
jsonrpc: '2.0'
error:
code: -32005
message: Too many requests
id: '1'
'500':
description: Internal Server Error - An error occurred on the server.
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
example:
jsonrpc: '2.0'
error:
code: -32603
message: Internal error
id: '1'
'503':
description: Service Unavailable - The service is temporarily unavailable.
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
example:
jsonrpc: '2.0'
error:
code: -32002
message: Service unavailable
id: '1'
'504':
description: Gateway Timeout - The request timed out.
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
example:
jsonrpc: '2.0'
error:
code: -32003
message: Gateway timeout
id: '1'
security:
- ApiKeyQuery: []
components:
examples:
getSlotLeadersRequest:
value:
jsonrpc: '2.0'
id: '1'
method: getSlotLeaders
params:
- 100
- 10
getSlotLeadersResponse:
value:
jsonrpc: '2.0'
id: '1'
result:
- ChorusmmK7i1AxXeiTtQgQZhQNiXYU84ULeaYF1EH15n
- ChorusmmK7i1AxXeiTtQgQZhQNiXYU84ULeaYF1EH15n
- ChorusmmK7i1AxXeiTtQgQZhQNiXYU84ULeaYF1EH15n
- ChorusmmK7i1AxXeiTtQgQZhQNiXYU84ULeaYF1EH15n
- Awes4Tr6TX8JDzEhCZY2QVNimT6iD1zWHzf1vNyGvpLM
- Awes4Tr6TX8JDzEhCZY2QVNimT6iD1zWHzf1vNyGvpLM
- Awes4Tr6TX8JDzEhCZY2QVNimT6iD1zWHzf1vNyGvpLM
- Awes4Tr6TX8JDzEhCZY2QVNimT6iD1zWHzf1vNyGvpLM
- DWvDTSh3qfn88UoQTEKRV2JnLt5jtJAVoiCo3ivtMwXP
- DWvDTSh3qfn88UoQTEKRV2JnLt5jtJAVoiCo3ivtMwXP
schemas:
ErrorResponse:
type: object
properties:
jsonrpc:
type: string
description: The JSON-RPC protocol version.
enum:
- '2.0'
example: '2.0'
error:
type: object
properties:
code:
type: integer
description: The error code.
example: -32602
message:
type: string
description: The error message.
data:
type: object
description: Additional data about the error.
id:
type: string
description: Identifier matching the request.
example: '1'
securitySchemes:
ApiKeyQuery:
type: apiKey
in: query
name: api-key
description: >-
Your Helius API key. You can get one for free in the
[dashboard](https://dashboard.helius.dev/api-keys).
````