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OpenAPI Specification
openapi: 3.2.0
info:
title: Forum Account Funding API
version: '1.0'
description: 'The Forum API provides programmatic access to the Forum perpetual futures exchange.
Trade attention-based perpetual futures, access real-time market data, and manage your account.
## Base URL
All endpoints are relative to `https://api.forum.market/v1`.
## Authentication
Public endpoints (market data, exchange status) require no authentication.
Private endpoints (orders, positions, account) require HMAC-SHA256 signed requests.
See the [Authentication](/api-reference/authentication) guide for details.
'
contact:
name: Forum Support
email: contact@forum.market
url: https://forum.market
termsOfService: https://forum-legal.s3.us-east-2.amazonaws.com/terms-of-service.pdf
servers:
- url: https://api.forum.market/v1
description: Production
security:
- ForumAccessKey: []
ForumAccessTimestamp: []
ForumAccessSign: []
tags:
- name: Funding
description: Funding rates and history
paths:
/markets/{ticker}/funding-rate:
get:
operationId: getFundingRate
summary: Get current funding rate
description: Returns the last and estimated next funding rate as well as last price, index value, and next funding time for a market.
tags:
- Funding
security: []
parameters:
- $ref: '#/components/parameters/TickerPath'
responses:
'200':
description: Funding rate information
content:
application/json:
schema:
$ref: '#/components/schemas/FundingRateInfo'
'429':
$ref: '#/components/responses/RateLimited'
/markets/{ticker}/funding-history:
get:
operationId: getFundingHistory
summary: Get funding rate history
description: Returns historical funding rates within a time range.
tags:
- Funding
security: []
parameters:
- $ref: '#/components/parameters/TickerPath'
- name: start
in: query
required: true
schema:
type: string
format: date-time
description: Start time (ISO 8601)
example: '2026-02-24T00:00:00.000Z'
- name: end
in: query
schema:
type: string
format: date-time
description: End time (ISO 8601). Defaults to current time.
- name: limit
in: query
schema:
type: integer
minimum: 1
maximum: 2500
default: 2500
responses:
'200':
description: Funding rate history
content:
application/json:
schema:
type: array
items:
$ref: '#/components/schemas/FundingHistoryRecord'
'400':
$ref: '#/components/responses/BadRequest'
'429':
$ref: '#/components/responses/RateLimited'
components:
responses:
RateLimited:
description: Rate limit exceeded
headers:
Retry-After:
schema:
type: integer
description: Seconds to wait before retrying
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
example:
error:
code: RATE_LIMIT_EXCEEDED
message: Rate limit exceeded. Try again in 5 seconds.
BadRequest:
description: Invalid request parameters
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
example:
error:
code: INVALID_PARAMETER
message: Request validation failed
details:
fields:
- field: ticker
message: Required
schemas:
FundingHistoryRecord:
type: object
required:
- ticker
- fundingRate
- timestamp
properties:
ticker:
type: string
example: OPENAI
fundingRate:
type: number
example: 0.0001
timestamp:
type: string
format: date-time
example: '2026-02-25T00:00:00.000Z'
ErrorResponse:
type: object
required:
- error
properties:
error:
type: object
required:
- code
- message
properties:
code:
type: string
description: Machine-readable error code
example: INVALID_PARAMETER
message:
type: string
description: Human-readable error message
example: Request validation failed
details:
type: object
description: Additional error details
example:
fields:
- field: ticker
message: Required
FundingRateInfo:
type: object
required:
- ticker
properties:
ticker:
type: string
example: OPENAI
fundingRate:
type:
- number
- 'null'
description: Last settled funding rate
example: 0.0001
movingFundingRate:
type:
- number
- 'null'
description: Estimated next funding rate based on the average premium index in the current funding window
example: 0.00012
lastPrice:
type:
- number
- 'null'
description: Last trade price in cents
example: 10550
indexValue:
type:
- number
- 'null'
description: Current attention index value
example: 100
nextFundingTime:
type:
- string
- 'null'
format: date-time
description: Next funding settlement time
example: '2026-02-25T08:00:00.000Z'
parameters:
TickerPath:
name: ticker
in: path
required: true
schema:
type: string
description: Market ticker symbol
example: OPENAI
securitySchemes:
ForumAccessKey:
type: apiKey
in: header
name: FORUM-ACCESS-KEY
description: Your API key ID (e.g. `fk_a1b2c3d4e5f6...`)
ForumAccessTimestamp:
type: apiKey
in: header
name: FORUM-ACCESS-TIMESTAMP
description: Unix epoch in seconds (UTC), as a string
ForumAccessSign:
type: apiKey
in: header
name: FORUM-ACCESS-SIGN
description: 'Base64-encoded HMAC-SHA256 signature.
**Signature generation:**
```
prehash = timestamp + method + requestPath + body
signature = Base64(HMAC-SHA256(secret, prehash))
```
'