Bullet

Bullet is Solana's high-performance trading layer — a decentralized exchange offering perpetual futures (derivatives), spot, and lending under one unified margin engine. The Bullet Trading API is a Binance USD-M Futures (FAPI) compatible REST and WebSocket interface for market data, account and position management, and order placement via ed25519-signed transactions, with official Rust and WASM/TypeScript SDKs. Bullet runs as a sovereign rollup settling to Solana mainnet-beta, with a testnet environment for building and testing against mock assets.

Bullet publishes 9 API contracts indexed on the APIs.io network, including Account API, Address API, Health API, and 6 more. Tagged areas include Company, DeFi, Solana, Cryptocurrency, and Derivatives.

The Bullet catalog on APIs.io includes 1 Spectral governance ruleset.

Bullet’s developer surface includes documentation, API reference, getting-started guide, authentication, sandbox, support, pricing, and 27 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

43.0/100 developing ▬ flat Agent 26/100 agent aware Front door AI 3/6 light Heartbeat 70/100 slowing saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

1 published contract 2 Agent Skills

Company DeFi Solana Cryptocurrency Derivatives Exchange Trading Perpetuals Lending Blockchain

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Blockchain & Digital Assets

AE-240

Rollup

GET /rollup/constants POST /rollup/simulate

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 43.0/100 · developing

Contract Quality 8.3 / 19

Developer Ergonomics 10.6 / 15

Access Clarity 5.4 / 15

Operational Transparency 1.6 / 10

Contract Governance 1.6 / 9

Discoverability 5.5 / 8

Regulatory Posture 2.6 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 26/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 0 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Securities & Market Data regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented) Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented) Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented) Ask about this →

8 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 44.5 — up to +13.9 composite points Ask about this →
Access Clarity scores 36.2 — up to +12.8 composite points Ask about this →
Operational Transparency scores 16.7 — up to +10.8 composite points Ask about this →

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/bullet/apis.yml: open an issue on github.com/api-evangelist/bullet to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 9

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

Bullet Account API

The Account API from Bullet — 8 operation(s) for account.

Bullet Address API

The Address API from Bullet — 1 operation(s) for address.

Bullet Health API

The Health API from Bullet — 4 operation(s) for health.

Bullet Market-Data API

The Market-Data API from Bullet — 11 operation(s) for market-data.

Bullet Rollup API

The Rollup API from Bullet — 3 operation(s) for rollup.

Bullet SolanaOffchainTx API

The SolanaOffchainTx API from Bullet — 1 operation(s) for solanaoffchaintx.

Bullet Trading API

The Trading API from Bullet — 2 operation(s) for trading.

Bullet Tx API

The Tx API from Bullet — 1 operation(s) for tx.

Bullet User Data (Beta) API

The User Data (Beta) API from Bullet — 6 operation(s) for user data (beta).

Scroll for all 9

Open Collections 9

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Bullet Trading Account API

OPEN COLLECTION

Bullet Trading Account Address API

OPEN COLLECTION

Bullet Trading Account Health API

OPEN COLLECTION

Bullet Trading Account Market-Data API

OPEN COLLECTION

Bullet Trading Account Rollup API

OPEN COLLECTION

Bullet Trading Account SolanaOffchainTx API

OPEN COLLECTION

Bullet Account Trading API

OPEN COLLECTION

Bullet Trading Account Tx API

OPEN COLLECTION

Bullet Trading Account User Data (Beta) API

OPEN COLLECTION

Scroll for all 9

Arazzo Workflows 1

Multi-step API workflows described with the Arazzo specification.

Bullet market-data snapshot

Discover markets then pull the order book, 24h ticker, and recent trades for a symbol.

ARAZZO

Agent Skills 2

Packaged agent skills for driving this provider's APIs from an AI assistant.

Monitor a Bullet account

AGENT SKILL

Pull Bullet market data

AGENT SKILL

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Bullet

SLA

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Bullet API Rules

53 rules · 42 error-severity 8 warn-severity 3 info-severity

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Bullet Trading Api Overlay

2 actions · update · bullet-trading-api-openapi.json

DERIVED

Security Posture 2

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

Bullet Authentication

signature · 1 scheme

SECURITY

Bullet Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

Bullet Agentic Access

37 operations · 3 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

Sandbox

SignUp

Documentation 3

Reference material describing how the API behaves

OpenAPI

OpenAPI

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

LLMsTxt

AgentSkill

WellKnown

AgenticAccess

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Arazzo

Build 3

SDKs, sample code, and the tooling you integrate with

Packages

Packages

SDKs

SDKs

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

StatusPage

StatusPage

Support

Support

Discord

Discord

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 4

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Overlay

Overlay

Telegram

Source (apis.yml)

aid: bullet
name: Bullet
description: Bullet is Solana's high-performance trading layer — a decentralized exchange offering perpetual futures (derivatives),
  spot, and lending under one unified margin engine. The Bullet Trading API is a Binance USD-M Futures (FAPI) compatible REST
  and WebSocket interface for market data, account and position management, and order placement via ed25519-signed transactions,
  with official Rust and WASM/TypeScript SDKs. Bullet runs as a sovereign rollup settling to Solana mainnet-beta, with a testnet
  environment for building and testing against mock assets.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  - sandbox
  generated: '2026-11-13'
  method: derived
image: https://tradingapi.bullet.xyz/docs/favicon-de23e50b.svg
url: https://raw.githubusercontent.com/api-evangelist/bullet/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- electric-capital
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
x-docs-platform: gitbook
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-09-21
tags:
- Company
- DeFi
- Solana
- Cryptocurrency
- Derivatives
- Exchange
- Trading
- Perpetuals
- Lending
- Blockchain
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: bullet:bullet-account-api
  name: Bullet Account API
  description: The Account API from Bullet — 8 operation(s) for account.
  humanURL: https://tradingapi.bullet.xyz/docs/
  baseURL: https://tradingapi.bullet.xyz
  tags:
  - Account
  properties:
  - type: OpenAPI
    url: openapi/bullet-account-api-openapi.yml
  - type: Documentation
    url: https://tradingapi.bullet.xyz/docs/
  - type: WebSocket
    url: https://tradingapi.bullet.xyz/docs/ws/
- aid: bullet:bullet-address-api
  name: Bullet Address API
  description: The Address API from Bullet — 1 operation(s) for address.
  humanURL: https://tradingapi.bullet.xyz/docs/
  baseURL: https://tradingapi.bullet.xyz
  tags:
  - Address
  properties:
  - type: OpenAPI
    url: openapi/bullet-address-api-openapi.yml
  - type: Documentation
    url: https://tradingapi.bullet.xyz/docs/
  - type: WebSocket
    url: https://tradingapi.bullet.xyz/docs/ws/
- aid: bullet:bullet-health-api
  name: Bullet Health API
  description: The Health API from Bullet — 4 operation(s) for health.
  humanURL: https://tradingapi.bullet.xyz/docs/
  baseURL: https://tradingapi.bullet.xyz
  tags:
  - Health
  properties:
  - type: OpenAPI
    url: openapi/bullet-health-api-openapi.yml
  - type: Documentation
    url: https://tradingapi.bullet.xyz/docs/
  - type: WebSocket
    url: https://tradingapi.bullet.xyz/docs/ws/
- aid: bullet:bullet-market-data-api
  name: Bullet Market-Data API
  description: The Market-Data API from Bullet — 11 operation(s) for market-data.
  humanURL: https://tradingapi.bullet.xyz/docs/
  baseURL: https://tradingapi.bullet.xyz
  tags:
  - Market Data
  tags_raw:
  - Market-Data
  properties:
  - type: OpenAPI
    url: openapi/bullet-market-data-api-openapi.yml
  - type: Documentation
    url: https://tradingapi.bullet.xyz/docs/
  - type: WebSocket
    url: https://tradingapi.bullet.xyz/docs/ws/
- aid: bullet:bullet-rollup-api
  name: Bullet Rollup API
  description: The Rollup API from Bullet — 3 operation(s) for rollup.
  humanURL: https://tradingapi.bullet.xyz/docs/
  baseURL: https://tradingapi.bullet.xyz
  tags:
  - Rollup
  properties:
  - type: OpenAPI
    url: openapi/bullet-rollup-api-openapi.yml
  - type: Documentation
    url: https://tradingapi.bullet.xyz/docs/
  - type: WebSocket
    url: https://tradingapi.bullet.xyz/docs/ws/
- aid: bullet:bullet-solanaoffchaintx-api
  name: Bullet SolanaOffchainTx API
  description: The SolanaOffchainTx API from Bullet — 1 operation(s) for solanaoffchaintx.
  humanURL: https://tradingapi.bullet.xyz/docs/
  baseURL: https://tradingapi.bullet.xyz
  tags:
  - SolanaOffchainTx
  properties:
  - type: OpenAPI
    url: openapi/bullet-solanaoffchaintx-api-openapi.yml
  - type: Documentation
    url: https://tradingapi.bullet.xyz/docs/
  - type: WebSocket
    url: https://tradingapi.bullet.xyz/docs/ws/
- aid: bullet:bullet-trading-api
  name: Bullet Trading API
  description: The Trading API from Bullet — 2 operation(s) for trading.
  humanURL: https://tradingapi.bullet.xyz/docs/
  baseURL: https://tradingapi.bullet.xyz
  tags:
  - Trading
  properties:
  - type: OpenAPI
    url: openapi/bullet-trading-api-openapi.yml
  - type: Documentation
    url: https://tradingapi.bullet.xyz/docs/
  - type: WebSocket
    url: https://tradingapi.bullet.xyz/docs/ws/
- aid: bullet:bullet-tx-api
  name: Bullet Tx API
  description: The Tx API from Bullet — 1 operation(s) for tx.
  humanURL: https://tradingapi.bullet.xyz/docs/
  baseURL: https://tradingapi.bullet.xyz
  tags:
  - Tx
  properties:
  - type: OpenAPI
    url: openapi/bullet-tx-api-openapi.yml
  - type: Documentation
    url: https://tradingapi.bullet.xyz/docs/
  - type: WebSocket
    url: https://tradingapi.bullet.xyz/docs/ws/
- aid: bullet:bullet-user-data-beta-api
  name: Bullet User Data (Beta) API
  description: The User Data (Beta) API from Bullet — 6 operation(s) for user data (beta).
  humanURL: https://tradingapi.bullet.xyz/docs/
  baseURL: https://tradingapi.bullet.xyz
  tags:
  - User Data (Beta)
  properties:
  - type: OpenAPI
    url: openapi/bullet-user-data-beta-api-openapi.yml
  - type: Documentation
    url: https://tradingapi.bullet.xyz/docs/
  - type: WebSocket
    url: https://tradingapi.bullet.xyz/docs/ws/
common:
- type: CapabilityMap
  url: capabilities/bullet-capability-edges.yml
  name: Bullet Business Capability Map
- type: OpenAPI
  url: openapi/_original/bullet-trading-api-openapi.json
- type: DeveloperPortal
  url: https://docs.bullet.xyz/
- type: Documentation
  url: https://docs.bullet.xyz/
- type: APIReference
  url: https://tradingapi.bullet.xyz/docs/
- type: GettingStarted
  url: https://tradingapi.bullet.xyz/docs/getting-started.html
- type: Authentication
  url: authentication/bullet-authentication.yml
- type: Packages
  url: packages/bullet-packages.yml
- type: SDKs
  url: packages/bullet-packages.yml
- type: Sandbox
  url: sandbox/bullet-sandbox.yml
- type: Conventions
  url: conventions/bullet-conventions.yml
- type: ErrorCatalog
  url: errors/bullet-problem-types.yml
- type: Lifecycle
  url: lifecycle/bullet-lifecycle.yml
- type: StatusPage
  url: https://status.bullet.xyz/
- type: Conformance
  url: conformance/bullet-conformance.yml
- type: DataModel
  url: data-model/bullet-data-model.yml
- type: X-MCPServerCandidate
  url: mcp/bullet-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: LLMsTxt
  url: llms/bullet-llms.txt
- type: Overlay
  url: overlays/bullet-trading-api-overlay.yaml
- type: AgentSkill
  url: skills/_index.yml
- type: Arazzo
  name: Bullet market-data snapshot
  url: arazzo/bullet-market-data-snapshot.yml
- type: WellKnown
  url: well-known/bullet-well-known.yml
- type: DomainSecurity
  url: security/bullet-domain-security.yml
- type: AgenticAccess
  url: agentic-access/bullet-agentic-access.yml
- type: GitHubOrganization
  url: https://github.com/bulletxyz
- type: Support
  url: https://docs.bullet.xyz/exchange/help-center/contact-support.md
- type: Pricing
  url: https://docs.bullet.xyz/exchange/trading/fees.md
- type: SignUp
  url: https://app.bullet.xyz/
- type: TermsOfService
  url: https://docs.bullet.xyz/legals/terms-and-conditions
- type: PrivacyPolicy
  url: https://docs.bullet.xyz/legals/privacy-policy
- type: Website
  url: https://www.bullet.xyz/
- type: X
  url: https://x.com/bulletxyz
- type: Discord
  url: https://discord.com/invite/QuP3YsRAtx
- type: Telegram
  url: https://t.me/bullet_xyz
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

Bullet API — frequently asked questions

Does Bullet have an API?

Yes. APIs.io lists 9 APIs from Bullet, including Bullet Account API, Bullet Address API and Bullet Health API, and 6 more.

Is there an OpenAPI specification for the Bullet API?

Yes. APIs.io indexes 9 OpenAPI specifications for Bullet, each linked for download from this page.

How do I authenticate with the Bullet API?

Bullet uses bearer-token authentication (signature · 1 scheme). The details are profiled on APIs.io as Bullet Authentication.

Is the Bullet API ready for AI agents?

Bullet has a Kin Score of 43.0 out of 100 (developing) and an Agent Readiness score of 26.0 (agent-aware), scored by API Evangelist on 2026-11-13.

Work with this as data

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