Bullish

Bullish is an institutional digital-asset exchange and custodian operating a regulated spot, perpetual, dated-futures and options venue with an integrated automated market maker, deterministic central limit order book matching, and qualified custody. It publishes a genuinely machine-readable API estate: a 79-operation OpenAPI 3.0.3 Trading API covering markets, orders, trades, AMM instructions, derivatives positions, portfolio-margin simulation, OTC and inter-dealer-broker booking, custody deposits and withdrawals, and history; six AsyncAPI 3.0.0 WebSocket documents for order book, trades, ticks, auction, index and private account data; and a FIX 4.2/5.0 order-entry and drop-copy surface. Authentication is JWT bearer minted from a client-signed ECDSA R1 or HMAC login rather than OAuth. Bullish is licensed or registered with the Gibraltar Financial Services Commission, BaFin (MiCA CASP and qualified crypto custodian), the Hong Kong SFC, FinCEN and NYDFS, and lists on the NYSE as BLSH.

agent ready

Solid contracts, transparent operations, and an easy start — typically complete on four or five facets with one clear soft spot.

travel_explore apis.io index code GitHub source public Website

API Evangelist profiles Bullish the way a machine reads it — 70 machine-readable artifacts across 32 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.

Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Bullish scores 62.9/100 (strong), with a separate agent-readiness read of 46/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.

Kin Score

This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.

Kin Score How this is scored →
scored 2026-08-17 · rubric v0.11.0

Composite quality — 62.9/100 · strong

Contract Quality 16.7 / 25

Developer Ergonomics 13.8 / 20

Commercial Clarity 12.1 / 20

Operational Transparency 11.3 / 13

Governance 1.4 / 12

Discoverability 8.2 / 10

Regulatory · Securities & Market Data 9.0 / 15

Agent readiness — 46/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract derived 2.5 / 10

MCP Server derived 3.0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8.0 / 8

Request/Response Examples partial 3.5 / 7

Rate-Limit Signaling documented 3.5 / 7

Typed Event Surface derived 1.5 / 6

Agent Skills derived 1.3 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Put this on your own site. The badge is drawn live from Bullish's current Kin Score — paste it once and it updates itself every time the score is recomputed. It follows your visitor's light or dark setting, and it links back here so anyone who sees it can read the full breakdown.

<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/bullish/"
   title="Bullish on API Evangelist — API profile and Kin Score">
  <img src="https://apis.io/badge/bullish.svg"
       alt="Bullish Kin Score — API readiness rating by API Evangelist" width="150" height="150" loading="lazy">
</a>

[![Bullish Kin Score — API readiness rating by API Evangelist](https://apis.io/badge/bullish/flat.svg)](https://providers.apievangelist.com/providers/bullish/)

<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/bullish/"
   title="Bullish on API Evangelist — API profile and Kin Score">
  <img src="https://apis.io/badge/bullish/card.svg"
       alt="Bullish Kin Score — API readiness rating by API Evangelist" width="340" height="120" loading="lazy">
</a>

More shapes, themes and sizes → · Score as JSON · How badges work

How we profile Bullish

Each block below is one kind of artifact we hold for Bullish. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.

APIs 32

Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.

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

Bullish Deprecated Features and APIs

A separately published OpenAPI document carrying the 15 operations Bullish has deprecated or decommissioned — the v1 order create/cancel/get surface, v1 AMM instructions, v1 spo...

Bullish WebSocket Multi-Order Book API

AsyncAPI 3.0.0 document for simultaneous subscriptions to multiple L1 and L2 order books across different Bullish markets over WebSocket.

Bullish WebSocket Anonymous Trades API

AsyncAPI 3.0.0 document for batched anonymous trade subscriptions across multiple Bullish markets over WebSocket.

Bullish WebSocket Anonymous Ticks API

AsyncAPI 3.0.0 document for simultaneous tick subscriptions across multiple Bullish markets over WebSocket.

Bullish WebSocket Auction Feed API

AsyncAPI 3.0.0 document for the real-time auction feed, delivering phase and order-imbalance data for Bullish markets with auctions enabled.

Bullish WebSocket Index Data API

AsyncAPI 3.0.0 document for streaming Bullish index prices, with the subscribed asset set controlled by subscription-message parameters.

Bullish WebSocket Private Data API

AsyncAPI 3.0.0 document for the authenticated private stream — real-time orders, trades, asset accounts, trading accounts, derivatives positions, AMM instructions and market-mak...

Bullish FIX API

The Bullish FIX order-entry, drop-copy, reference-data and trading-status surface for institutional and high-frequency clients, with session management and component definitions...

Bullish Aggregator API

A small non-authenticated REST surface publishing aggregated public market data — tickers with 24-hour rolling statistics, order books, and the last 100 trades, each optionally ...

Bullish Account Assets API

Authenticated APIs for reading account data

Bullish Amm Instructions API

Authenticated APIs that allow users to Create, View and Terminate AMM instructions. Please refer to the [AMM instruction Overview Doc](https://github.com/bullish-exchange/api-do...

Bullish Asset Data API

Non-authenticated APIs for accessing general asset data information

Bullish Auction Public API

The auction-public API from Bullish — 2 operation(s) for auction-public.

Bullish command entry API

Authenticated API for submitting commands into the exchange.

Bullish Custody API

Authenticated APIs for custody, [Custody Basic Examples](https://github.com/bullish-exchange/api-examples/blob/master/bullish/rest/custody_basics.py) Custody APIs have a limit o...

Bullish deprecated - q3 2024 API

List of deprecated APIs that will be removed towards the end of Q3 2024.

Bullish Derivatives API

The derivatives API from Bullish — 1 operation(s) for derivatives.

Bullish Derivatives Public API

The derivatives-public API from Bullish — 3 operation(s) for derivatives-public.

Bullish General API

The general API from Bullish — 2 operation(s) for general.

Bullish History API

The history API from Bullish — 5 operation(s) for history.

Bullish Idb API

The Inter-dealer Broker (IDB) API is available to authorized inter-dealer brokers to book OTC trades on Bullish on behalf of their respective end customers.

Bullish Index Price Data API

The index-price-data API from Bullish — 2 operation(s) for index-price-data.

Bullish Market Data API

Non-authenticated APIs for accessing general market data information

Bullish Market History Data API

The market-history-data API from Bullish — 4 operation(s) for market-history-data.

Bullish Market Maker Protection API

The market-maker-protection API from Bullish — 1 operation(s) for market-maker-protection.

Bullish Orders API

Authenticated APIs for interacting with orders

Bullish Otc API

The OTC Clearing Facility API (OTC API) is available to customers to book trades negotiated outside of the Bullish Exchange order book to Bullish's clearing and settlement platf...

Bullish Portfolio Margin Simulator API

The portfolio-margin-simulator API from Bullish — 2 operation(s) for portfolio-margin-simulator.

Bullish Session Management API

The session-management API from Bullish — 3 operation(s) for session-management.

Bullish Trades API

Authenticated APIs for reading trade data

Bullish Trading Accounts API

The trading-accounts API from Bullish — 2 operation(s) for trading-accounts.

Bullish Transfer API

Authenticated API for initiating asset transfers between trading accounts.

Scroll within the panel for all 32 ·

Open Collections 25

Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.

MCP Servers 1

Model Context Protocol servers expose these APIs directly to AI agents. We profile them because agent-native access is the fastest-growing way this provider's capabilities actually get used.

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

An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.

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

Bullish Agentic Access

94 operations · 29 acting · 3 human-in-the-loop

94 operations · 29 acting

AGENTIC

Resources

Every other property we hold for Bullish — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.

Get Started 5

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Sandbox

Sandbox

Documentation 4

Reference material describing how the API behaves

Documentation

APIReference

OpenAPI

AsyncAPI

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

MCPServer

AgenticAccess

LLMsTxt

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Lifecycle

ErrorCatalog

Conventions

Conformance

DataModel

Build 3

SDKs, sample code, and the tooling you integrate with

Packages

Packages

SDKs

SDKs

GitHubOrganization

GitHubOrganization

Access & Security 6

Authentication, authorization, and security posture

DomainSecurity

Authentication

Security

TrustCenter

Compliance

VulnerabilityDisclosure

VulnerabilityDisclosure

Operate 6

Status, limits, changes, and where to get help

ChangeLog

StatusPage

Deprecation

RateLimits

Support

HelpCenter

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

← All providers · Data indexed from github.com/api-evangelist/bullish · machine-readable index on apis.io

Where this information came from

This is an independent, third-party profile of Bullish, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

info@apievangelist.com · Read the full data-sourcing policy →
On a security or compliance team? Put security in the subject line and you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.

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