Forum website screenshot

Forum

Forum is a centralized exchange offering exposure to engagement-backed assets — "the first exchange to trade on attention." It turns online attention across social, search, and streaming data into measurable, tradable attention indices, then lists continuous perpetual-style futures contracts on top of them so participants can go long or short on cultural relevance as a new asset class. Forum (Y Combinator W26, based in New York City) exposes a full public developer surface: an OpenAPI 3.1 REST API at api.forum.market/v1 for market data, order management, positions, and account queries, and an AsyncAPI 3.0 WebSocket feed at wss://api.forum.market/ws/v1 for real-time order book, ticker, trade, index, and funding updates. Authentication is HMAC-SHA256 request signing with read/trade API-key permissions, and the docs ship an agent-native discovery surface (llms.txt, agent-card, agent-skills, and a documentation MCP server).

Forum publishes 9 APIs on the APIs.io network, including Account API, Exchange API, Fills API, and 6 more. Tagged areas include Company, Trading, Exchange, Perpetual Futures, and Market Data.

The Forum catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Forum’s developer surface includes documentation, API reference, getting-started guide, quickstart, signup flow, support, changelog, and 21 more developer resources.

🌐 Visit website 📡 Source on GitHub
48.9/100 developing ▬ flat Agent 90/100 agent native Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessSelf serve
9 APIs 1 MCP Servers
CompanyTradingExchangePerpetual FuturesMarket DataAttention EconomyFintechWebSocketReal Time

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 48.9/100 · developing
Contract Quality 18.6 / 25
Developer Ergonomics 13.0 / 20
Commercial Clarity 4.7 / 20
Operational Transparency 3.1 / 13
Governance 0.0 / 12
Discoverability 10.0 / 10
Agent readiness — 90/100 · agent native
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 9 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 6 / 6
Agent Skills 5 / 5
Well-Known Catalog 4 / 4
Consent & Bot Identity 0 / 3
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/forum: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 9

Individual APIs this provider publishes, each with its own machine-readable definition.

Forum Account API

Account summary and balance

Forum Exchange API

Exchange status and server time

Forum Fills API

Trade execution history

Forum Funding API

Funding rates and history

Forum Indices API

Attention index values and history

Forum Market Data API

Order books, tickers, trades, and candles

Forum Markets API

Market listings and details

Forum Orders API

Order placement, cancellation, and queries

Forum Positions API

Open position data

Scroll for all 9

Arazzo Workflows 2

Multi-step API workflows described with the Arazzo specification.

_Index

ARAZZO

Forum — discover a market and place an order

Check exchange status, list available attention-index markets, inspect one market, place a limit order (idempotent via clientOrderId), confirm the order, then read the resulting...

ARAZZO

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

forum-mcp.yml

MCP SERVER

Rate Limits 1

Documented rate limits and quota policies.

Forum Rate Limits

0 limits

RATE LIMITS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Forum WebSocket Feed

Real-time market data and private account updates via WebSocket. ## Connection Connect to `wss://api.forum.market/ws/v1` to establish a WebSocket connection. You must send a `su...

ASYNCAPI

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Forum Authentication

apiKey · 3 schemes

SECURITY

Forum Domain Security

TLSv1.2 · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Forum Agentic Access

24 operations · 6 acting

24 operations · 6 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 Quickstart
Quickstart
 SignUp
SignUp

Documentation 4

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference
 OpenAPI
OpenAPI
 AsyncAPI
AsyncAPI

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 WellKnown
WellKnown
 MCPServer
MCPServer
 AgentSkill
AgentSkill
 LLMsTxt
LLMsTxt

Design & Contract 8

Pagination, idempotency, versioning, errors, and events

Webhooks
Webhooks
 Conventions
Conventions
 Idempotency
Idempotency
 ErrorCatalog
ErrorCatalog
 Lifecycle
Lifecycle
 DataModel
DataModel
 Conformance
Conformance
 Arazzo
Arazzo

Scroll for all 8

Access & Security 2

Authentication, authorization, and security posture

Authentication
Authentication
 DomainSecurity
DomainSecurity

Operate 3

Status, limits, changes, and where to get help

Support
Support
 ChangeLog
ChangeLog
 RateLimits
RateLimits

Commercial 1

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService

Other 1

Properties that don't map to a standard resource type

Overlay
Overlay

Source (apis.yml)

apis.yml Raw ↑ 
aid: forum
name: Forum
description: 'Forum is a centralized exchange offering exposure to engagement-backed assets — "the first exchange to trade
  on attention." It turns online attention across social, search, and streaming data into measurable, tradable attention indices,
  then lists continuous perpetual-style futures contracts on top of them so participants can go long or short on cultural
  relevance as a new asset class. Forum (Y Combinator W26, based in New York City) exposes a full public developer surface:
  an OpenAPI 3.1 REST API at api.forum.market/v1 for market data, order management, positions, and account queries, and an
  AsyncAPI 3.0 WebSocket feed at wss://api.forum.market/ws/v1 for real-time order book, ticker, trade, index, and funding
  updates. Authentication is HMAC-SHA256 request signing with read/trade API-key permissions, and the docs ship an agent-native
  discovery surface (llms.txt, agent-card, agent-skills, and a documentation MCP server).'
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://mintcdn.com/forum-f20ab882/NO88uiJ9um9e-WSg/images/dark.png
url: https://raw.githubusercontent.com/api-evangelist/forum/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: enriched
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Trading
- Exchange
- Perpetual Futures
- Market Data
- Attention Economy
- Fintech
- WebSocket
- Real Time
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: forum:forum-account-api
  name: Forum Account API
  description: Account summary and balance
  humanURL: https://docs.forum.market/api-reference/introduction
  baseURL: https://api.forum.market/v1
  tags:
  - Account
  properties:
  - type: OpenAPI
    url: openapi/forum-account-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/forum-websocket-asyncapi.yml
- aid: forum:forum-exchange-api
  name: Forum Exchange API
  description: Exchange status and server time
  humanURL: https://docs.forum.market/api-reference/introduction
  baseURL: https://api.forum.market/v1
  tags:
  - Exchange
  properties:
  - type: OpenAPI
    url: openapi/forum-exchange-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/forum-websocket-asyncapi.yml
- aid: forum:forum-fills-api
  name: Forum Fills API
  description: Trade execution history
  humanURL: https://docs.forum.market/api-reference/introduction
  baseURL: https://api.forum.market/v1
  tags:
  - Fills
  properties:
  - type: OpenAPI
    url: openapi/forum-fills-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/forum-websocket-asyncapi.yml
- aid: forum:forum-funding-api
  name: Forum Funding API
  description: Funding rates and history
  humanURL: https://docs.forum.market/api-reference/introduction
  baseURL: https://api.forum.market/v1
  tags:
  - Funding
  properties:
  - type: OpenAPI
    url: openapi/forum-funding-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/forum-websocket-asyncapi.yml
- aid: forum:forum-indices-api
  name: Forum Indices API
  description: Attention index values and history
  humanURL: https://docs.forum.market/api-reference/introduction
  baseURL: https://api.forum.market/v1
  tags:
  - Indices
  properties:
  - type: OpenAPI
    url: openapi/forum-indices-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/forum-websocket-asyncapi.yml
- aid: forum:forum-market-data-api
  name: Forum Market Data API
  description: Order books, tickers, trades, and candles
  humanURL: https://docs.forum.market/api-reference/introduction
  baseURL: https://api.forum.market/v1
  tags:
  - Market Data
  properties:
  - type: OpenAPI
    url: openapi/forum-market-data-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/forum-websocket-asyncapi.yml
- aid: forum:forum-markets-api
  name: Forum Markets API
  description: Market listings and details
  humanURL: https://docs.forum.market/api-reference/introduction
  baseURL: https://api.forum.market/v1
  tags:
  - Markets
  properties:
  - type: OpenAPI
    url: openapi/forum-markets-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/forum-websocket-asyncapi.yml
- aid: forum:forum-orders-api
  name: Forum Orders API
  description: Order placement, cancellation, and queries
  humanURL: https://docs.forum.market/api-reference/introduction
  baseURL: https://api.forum.market/v1
  tags:
  - Orders
  properties:
  - type: OpenAPI
    url: openapi/forum-orders-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/forum-websocket-asyncapi.yml
- aid: forum:forum-positions-api
  name: Forum Positions API
  description: Open position data
  humanURL: https://docs.forum.market/api-reference/introduction
  baseURL: https://api.forum.market/v1
  tags:
  - Positions
  properties:
  - type: OpenAPI
    url: openapi/forum-positions-api-openapi.yml
  - type: AsyncAPI
    url: asyncapi/forum-websocket-asyncapi.yml
common:
- type: DeveloperPortal
  url: https://docs.forum.market/
- type: Documentation
  url: https://docs.forum.market/
- type: APIReference
  url: https://docs.forum.market/api-reference/introduction
- type: GettingStarted
  url: https://docs.forum.market/api-reference/quick-start
- type: Quickstart
  url: https://docs.forum.market/api-reference/quick-start
- type: SignUp
  url: https://app.forum.market/
- type: TermsOfService
  url: https://forum-legal.s3.us-east-2.amazonaws.com/terms-of-service.pdf
- type: Support
  url: https://docs.forum.market/guide/feedback
- type: ChangeLog
  url: changelog/forum-changelog.yml
- type: OpenAPI
  url: openapi/forum-openapi-original.yml
- type: AsyncAPI
  url: asyncapi/forum-websocket-asyncapi.yml
- type: Webhooks
  url: asyncapi/forum-websocket-asyncapi.yml
- type: Authentication
  url: authentication/forum-authentication.yml
- type: Conventions
  url: conventions/forum-conventions.yml
- type: Idempotency
  url: conventions/forum-conventions.yml
- type: RateLimits
  url: rate-limits/forum-rate-limits.yml
- type: ErrorCatalog
  url: errors/forum-error-codes.yml
- type: Lifecycle
  url: lifecycle/forum-lifecycle.yml
- type: DataModel
  url: data-model/forum-data-model.yml
- type: Conformance
  url: conformance/forum-conformance.yml
- type: AgenticAccess
  url: agentic-access/forum-agentic-access.yml
- type: DomainSecurity
  url: security/forum-domain-security.yml
- type: WellKnown
  url: well-known/forum-well-known.yml
- type: MCPServer
  url: mcp/forum-mcp.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/forum-llms.txt
- type: Overlay
  url: overlays/forum-openapi-overlay.yaml
- type: Arazzo
  name: Discover a market and place an order
  url: arazzo/forum-place-order.yml
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 20
  pass: local-v1