B3

B3 is an onchain economy platform founded by former Coinbase leaders, operating an EVM-equivalent Layer-3 gaming and payments chain settling to Base. B3 ships across three engines: Labs (products such as Basement/Bsmnt, HypeDuel, AnySpend, XCade and B3AR), B3OS (a credit-based, no-code automation platform for cross-chain workflows), and Holdings (strategic investments). For developers B3 exposes the B3OS Workflow API (workflows, triggers, actions, runs, connectors, outbound webhooks and an x402 payment surface), a free public B3 Data API (Blockscout + Thirdweb Insights indexed onchain data), a Profiles API for aggregated onchain identity, and Global Accounts SDKs. B3 was surfaced as a portfolio company of Pantera Capital and enriched into the API Evangelist network.

B3 publishes 39 APIs on the APIs.io network, including Action API, Actions API, Admin API, and 36 more. Tagged areas include Company, Crypto, Blockchain, Web3, and Workflow Automation.

The B3 catalog on APIs.io includes 1 event-driven AsyncAPI specification.

B3’s developer surface includes authentication, sandbox, documentation, API reference, quickstart, pricing, engineering blog, and 22 more developer resources.

🌐 Visit website 📡 Source on GitHub

48.6/100 developing ▬ flat Agent 43/100 agent ready Full breakdown ↓
scored 2026-08-10 · rubric v0.9.1

AccessSelf serve

39 APIs 1 MCP Servers

CompanyCryptoBlockchainWeb3Workflow AutomationOnchain DataGamingPaymentsLayer 3Developer Tools

Kin Score

Kin Score How this is scored →
scored 2026-08-10 · rubric v0.9.1

Composite quality — 48.6/100 · developing

Contract Quality 13.1 / 25

Developer Ergonomics 13.8 / 20

Commercial Clarity 8.9 / 20

Operational Transparency 3.8 / 13

Governance 1.4 / 12

Discoverability 9.3 / 10

Agent readiness — 43/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

MCP Server 12 / 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 6 / 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

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/b3: 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 39

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

MCP Servers 1

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

Get Started 4

Portal, sign-up, and the first successful call

Sandbox

Sandbox

Quickstart

Quickstart

DeveloperPortal

DeveloperPortal

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

LLMsTxt

AgentSkill

MCPServer

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Conventions

Components

ErrorCatalog

DataModel

Conformance

Lifecycle

Webhooks

Scroll for all 7

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

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

StatusPage

StatusPage

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Blog

Blog

Website

Website

Source (apis.yml)

aid: b3
name: B3
description: 'B3 is an onchain economy platform founded by former Coinbase leaders, operating an EVM-equivalent Layer-3 gaming
  and payments chain settling to Base. B3 ships across three engines: Labs (products such as Basement/Bsmnt, HypeDuel, AnySpend,
  XCade and B3AR), B3OS (a credit-based, no-code automation platform for cross-chain workflows), and Holdings (strategic investments).
  For developers B3 exposes the B3OS Workflow API (workflows, triggers, actions, runs, connectors, outbound webhooks and an
  x402 payment surface), a free public B3 Data API (Blockscout + Thirdweb Insights indexed onchain data), a Profiles API for
  aggregated onchain identity, and Global Accounts SDKs. B3 was surfaced as a portfolio company of Pantera Capital and enriched
  into the API Evangelist network.'
url: https://raw.githubusercontent.com/api-evangelist/b3/refs/heads/main/apis.yml
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://b3.fun/favicon.ico
x-type: company
x-source: vc-portfolio
x-backed-by:
- pantera-capital
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-22'
tags:
- Company
- Crypto
- Blockchain
- Web3
- Workflow Automation
- Onchain Data
- Gaming
- Payments
- Layer 3
- Developer Tools
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: b3:b3-action-api
  name: B3 Action API
  description: The Action API from B3 — 1 operation(s) for action.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Action
  properties:
  - type: OpenAPI
    url: openapi/b3-action-api-openapi.yml
- aid: b3:b3-actions-api
  name: B3 Actions API
  description: The Actions API from B3 — 2 operation(s) for actions.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Actions
  properties:
  - type: OpenAPI
    url: openapi/b3-actions-api-openapi.yml
- aid: b3:b3-admin-api
  name: B3 Admin API
  description: The Admin API from B3 — 19 operation(s) for admin.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Admin
  properties:
  - type: OpenAPI
    url: openapi/b3-admin-api-openapi.yml
- aid: b3:b3-ai-api
  name: B3 Ai API
  description: The Ai API from B3 — 3 operation(s) for ai.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Ai
  properties:
  - type: OpenAPI
    url: openapi/b3-ai-api-openapi.yml
- aid: b3:b3-api-keys-api
  name: B3 Api Keys API
  description: The Api Keys API from B3 — 2 operation(s) for api keys.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Api Keys
  properties:
  - type: OpenAPI
    url: openapi/b3-api-keys-api-openapi.yml
- aid: b3:b3-connector-types-api
  name: B3 Connector Types API
  description: The Connector Types API from B3 — 2 operation(s) for connector types.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Connector Types
  properties:
  - type: OpenAPI
    url: openapi/b3-connector-types-api-openapi.yml
- aid: b3:b3-connectors-api
  name: B3 Connectors API
  description: The Connectors API from B3 — 2 operation(s) for connectors.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Connectors
  properties:
  - type: OpenAPI
    url: openapi/b3-connectors-api-openapi.yml
- aid: b3:b3-contract-api
  name: B3 Contract API
  description: The Contract API from B3 — 11 operation(s) for contract.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Contract
  properties:
  - type: OpenAPI
    url: openapi/b3-contract-api-openapi.yml
- aid: b3:b3-contracts-api
  name: B3 Contracts API
  description: The Contracts API from B3 — 3 operation(s) for contracts.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Contracts
  properties:
  - type: OpenAPI
    url: openapi/b3-contracts-api-openapi.yml
- aid: b3:b3-cu-api
  name: B3 CU API
  description: The CU API from B3 — 4 operation(s) for cu.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - CU
  properties:
  - type: OpenAPI
    url: openapi/b3-cu-api-openapi.yml
- aid: b3:b3-faucet-api
  name: B3 faucet API
  description: The faucet API from B3 — 1 operation(s) for faucet.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - faucet
  properties:
  - type: OpenAPI
    url: openapi/b3-faucet-api-openapi.yml
- aid: b3:b3-integrations-api
  name: B3 Integrations API
  description: The Integrations API from B3 — 1 operation(s) for integrations.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Integrations
  properties:
  - type: OpenAPI
    url: openapi/b3-integrations-api-openapi.yml
- aid: b3:b3-internal-api
  name: B3 Internal API
  description: The Internal API from B3 — 1 operation(s) for internal.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Internal
  properties:
  - type: OpenAPI
    url: openapi/b3-internal-api-openapi.yml
- aid: b3:b3-invites-api
  name: B3 Invites API
  description: The Invites API from B3 — 1 operation(s) for invites.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Invites
  properties:
  - type: OpenAPI
    url: openapi/b3-invites-api-openapi.yml
- aid: b3:b3-logic-actions-api
  name: B3 Logic Actions API
  description: The Logic Actions API from B3 — 1 operation(s) for logic actions.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Logic Actions
  properties:
  - type: OpenAPI
    url: openapi/b3-logic-actions-api-openapi.yml
- aid: b3:b3-metrics-api
  name: B3 Metrics API
  description: The Metrics API from B3 — 4 operation(s) for metrics.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Metrics
  properties:
  - type: OpenAPI
    url: openapi/b3-metrics-api-openapi.yml
- aid: b3:b3-onboarding-api
  name: B3 onboarding API
  description: The onboarding API from B3 — 6 operation(s) for onboarding.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - onboarding
  properties:
  - type: OpenAPI
    url: openapi/b3-onboarding-api-openapi.yml
- aid: b3:b3-organization-storage-api
  name: B3 Organization Storage API
  description: The Organization Storage API from B3 — 6 operation(s) for organization storage.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Organization Storage
  properties:
  - type: OpenAPI
    url: openapi/b3-organization-storage-api-openapi.yml
- aid: b3:b3-organizations-api
  name: B3 Organizations API
  description: The Organizations API from B3 — 3 operation(s) for organizations.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Organizations
  properties:
  - type: OpenAPI
    url: openapi/b3-organizations-api-openapi.yml
- aid: b3:b3-orgs-api
  name: B3 Orgs API
  description: The Orgs API from B3 — 6 operation(s) for orgs.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Orgs
  properties:
  - type: OpenAPI
    url: openapi/b3-orgs-api-openapi.yml
- aid: b3:b3-outbound-webhook-api
  name: B3 Outbound Webhook API
  description: The Outbound Webhook API from B3 — 4 operation(s) for outbound webhook.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Outbound Webhook
  properties:
  - type: OpenAPI
    url: openapi/b3-outbound-webhook-api-openapi.yml
- aid: b3:b3-pipedream-api
  name: B3 Pipedream API
  description: The Pipedream API from B3 — 5 operation(s) for pipedream.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Pipedream
  properties:
  - type: OpenAPI
    url: openapi/b3-pipedream-api-openapi.yml
- aid: b3:b3-public-api
  name: B3 Public API
  description: The Public API from B3 — 3 operation(s) for public.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Public
  properties:
  - type: OpenAPI
    url: openapi/b3-public-api-openapi.yml
- aid: b3:b3-runs-api
  name: B3 Runs API
  description: The Runs API from B3 — 5 operation(s) for runs.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Runs
  properties:
  - type: OpenAPI
    url: openapi/b3-runs-api-openapi.yml
- aid: b3:b3-search-api
  name: B3 Search API
  description: The Search API from B3 — 2 operation(s) for search.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Search
  properties:
  - type: OpenAPI
    url: openapi/b3-search-api-openapi.yml
- aid: b3:b3-seo-api
  name: B3 seo API
  description: The seo API from B3 — 4 operation(s) for seo.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - seo
  properties:
  - type: OpenAPI
    url: openapi/b3-seo-api-openapi.yml
- aid: b3:b3-statistics-api
  name: B3 Statistics API
  description: The Statistics API from B3 — 3 operation(s) for statistics.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Statistics
  properties:
  - type: OpenAPI
    url: openapi/b3-statistics-api-openapi.yml
- aid: b3:b3-tags-api
  name: B3 tags API
  description: The tags API from B3 — 2 operation(s) for tags.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - tags
  properties:
  - type: OpenAPI
    url: openapi/b3-tags-api-openapi.yml
- aid: b3:b3-telegram-bot-api
  name: B3 Telegram Bot API
  description: The Telegram Bot API from B3 — 3 operation(s) for telegram bot.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Telegram Bot
  properties:
  - type: OpenAPI
    url: openapi/b3-telegram-bot-api-openapi.yml
- aid: b3:b3-templates-api
  name: B3 Templates API
  description: The Templates API from B3 — 10 operation(s) for templates.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Templates
  properties:
  - type: OpenAPI
    url: openapi/b3-templates-api-openapi.yml
- aid: b3:b3-token-price-cexes-api
  name: B3 Token Price Cexes API
  description: The Token Price Cexes API from B3 — 2 operation(s) for token price cexes.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Token Price Cexes
  properties:
  - type: OpenAPI
    url: openapi/b3-token-price-cexes-api-openapi.yml
- aid: b3:b3-triggers-api
  name: B3 Triggers API
  description: The Triggers API from B3 — 2 operation(s) for triggers.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Triggers
  properties:
  - type: OpenAPI
    url: openapi/b3-triggers-api-openapi.yml
- aid: b3:b3-wallets-api
  name: B3 wallets API
  description: The wallets API from B3 — 4 operation(s) for wallets.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - wallets
  properties:
  - type: OpenAPI
    url: openapi/b3-wallets-api-openapi.yml
- aid: b3:b3-webhook-events-api
  name: B3 Webhook Events API
  description: The Webhook Events API from B3 — 2 operation(s) for webhook events.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Webhook Events
  properties:
  - type: OpenAPI
    url: openapi/b3-webhook-events-api-openapi.yml
- aid: b3:b3-workflow-templates-api
  name: B3 workflow-templates API
  description: The workflow-templates API from B3 — 2 operation(s) for workflow-templates.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - workflow-templates
  properties:
  - type: OpenAPI
    url: openapi/b3-workflow-templates-api-openapi.yml
- aid: b3:b3-workflows-api
  name: B3 Workflows API
  description: The Workflows API from B3 — 22 operation(s) for workflows.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - Workflows
  properties:
  - type: OpenAPI
    url: openapi/b3-workflows-api-openapi.yml
- aid: b3:b3-x402-endpoints-api
  name: B3 X402 Endpoints API
  description: The X402 Endpoints API from B3 — 9 operation(s) for x402 endpoints.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  tags:
  - X402 Endpoints
  properties:
  - type: OpenAPI
    url: openapi/b3-x402-endpoints-api-openapi.yml
- aid: b3:b3-b3os-workflow-openapi
  name: B3OS Workflow API
  description: B3OS Workflow API from B3 — 262 path(s) described in OpenAPI.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  properties:
  - type: OpenAPI
    url: openapi/b3-b3os-workflow-openapi.json
- aid: b3:b3-data-api-openapi
  name: B3 Data API - Multi-Chain Data API
  description: B3 Data API - Multi-Chain Data API from B3 — 93 path(s) described in OpenAPI.
  humanURL: https://docs.b3.fun/data/api-reference/index
  baseURL: https://api.b3os.org/v1
  properties:
  - type: OpenAPI
    url: openapi/b3-data-api-openapi.json
common:
- type: AgenticAccess
  url: agentic-access/b3-agentic-access.yml
- type: DomainSecurity
  url: security/b3-domain-security.yml
- type: Authentication
  url: authentication/b3-authentication.yml
- type: Packages
  url: packages/b3-packages.yml
- type: SDKs
  url: packages/b3-packages.yml
- type: LLMsTxt
  url: llms/b3-llms.txt
- type: Conventions
  url: conventions/b3-conventions.yml
- type: Sandbox
  url: sandbox/b3-sandbox.yml
- type: Components
  url: components/b3-components.yml
- type: AgentSkill
  url: skills/_index.yml
- type: ErrorCatalog
  url: errors/b3-problem-types.yml
- type: DataModel
  url: data-model/b3-data-model.yml
- type: Conformance
  url: conformance/b3-conformance.yml
- type: Lifecycle
  url: lifecycle/b3-lifecycle.yml
- type: StatusPage
  url: https://status.b3.fun
- type: Webhooks
  url: asyncapi/b3-b3os-webhooks.yml
- type: MCPServer
  url: mcp/b3-mcp.yml
- type: Documentation
  url: https://docs.b3.fun/
- type: APIReference
  url: https://docs.b3.fun/data/api-reference/index
- type: Quickstart
  url: https://docs.b3.fun/quickstart
- type: DeveloperPortal
  url: https://docs.b3.fun/
- type: Pricing
  url: https://b3os.org/pricing
- type: Login
  url: https://b3os.org/login
- type: TermsOfService
  url: https://b3os.org/terms
- type: PrivacyPolicy
  url: https://b3os.org/privacy
- type: Blog
  url: https://b3os.org/blog
- type: GitHubOrganization
  url: https://github.com/b3-fun
- type: Support
  url: https://discord.gg/b3dotfun
- type: Website
  url: https://b3.fun/
x-enrichment:
  date: '2026-07-22'
  status: enriched
  pass: round-2
  note: 'Round 2: harvested the B3 Data API OpenAPI (data-api.b3.fun/swagger.json, 93 paths) round 1 missed and fixed its
    docs-page baseURL; refreshed the B3OS Workflow spec (159 -> 262 paths, new AI/agent-runs/app-gateway surfaces — openapi/
    splits predate this refresh, re-run refine-openapis to pick them up); added sandbox (testnets + faucet), components (SDK
    UI), 3 agent skills; probed VDP/trust-center (none) and well-known on api.b3os.org + data-api.b3.fun (all 404).'

B3