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.
Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.
API Evangelist profiles B3 the way a machine reads it — 42 machine-readable artifacts across 37 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 — B3 scores 52.3/100 (developing), with a separate agent-readiness read of 71/100 (agent native). 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 2026-07-27 · rubric v0.5
How we profile B3
Each block below is one kind of artifact we hold for B3. 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 37
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.
B3 Action API
The Action API from B3 — 1 operation(s) for action.
B3 Actions API
The Actions API from B3 — 2 operation(s) for actions.
B3 Admin API
The Admin API from B3 — 19 operation(s) for admin.
B3 Ai API
The Ai API from B3 — 3 operation(s) for ai.
B3 Api Keys API
The Api Keys API from B3 — 2 operation(s) for api keys.
B3 Connector Types API
The Connector Types API from B3 — 2 operation(s) for connector types.
B3 Connectors API
The Connectors API from B3 — 2 operation(s) for connectors.
B3 Contract API
The Contract API from B3 — 11 operation(s) for contract.
B3 Contracts API
The Contracts API from B3 — 3 operation(s) for contracts.
B3 CU API
The CU API from B3 — 4 operation(s) for cu.
B3 faucet API
The faucet API from B3 — 1 operation(s) for faucet.
B3 Integrations API
The Integrations API from B3 — 1 operation(s) for integrations.
B3 Internal API
The Internal API from B3 — 1 operation(s) for internal.
B3 Invites API
The Invites API from B3 — 1 operation(s) for invites.
B3 Logic Actions API
The Logic Actions API from B3 — 1 operation(s) for logic actions.
B3 Metrics API
The Metrics API from B3 — 4 operation(s) for metrics.
B3 onboarding API
The onboarding API from B3 — 6 operation(s) for onboarding.
B3 Organization Storage API
The Organization Storage API from B3 — 6 operation(s) for organization storage.
B3 Organizations API
The Organizations API from B3 — 3 operation(s) for organizations.
B3 Orgs API
The Orgs API from B3 — 6 operation(s) for orgs.
B3 Outbound Webhook API
The Outbound Webhook API from B3 — 4 operation(s) for outbound webhook.
B3 Pipedream API
The Pipedream API from B3 — 5 operation(s) for pipedream.
B3 Public API
The Public API from B3 — 3 operation(s) for public.
B3 Runs API
The Runs API from B3 — 5 operation(s) for runs.
B3 Search API
The Search API from B3 — 2 operation(s) for search.
B3 seo API
The seo API from B3 — 4 operation(s) for seo.
B3 Statistics API
The Statistics API from B3 — 3 operation(s) for statistics.
B3 tags API
The tags API from B3 — 2 operation(s) for tags.
B3 Telegram Bot API
The Telegram Bot API from B3 — 3 operation(s) for telegram bot.
B3 Templates API
The Templates API from B3 — 10 operation(s) for templates.
B3 Token Price Cexes API
The Token Price Cexes API from B3 — 2 operation(s) for token price cexes.
B3 Triggers API
The Triggers API from B3 — 2 operation(s) for triggers.
B3 wallets API
The wallets API from B3 — 4 operation(s) for wallets.
B3 Webhook Events API
The Webhook Events API from B3 — 2 operation(s) for webhook events.
B3 workflow-templates API
The workflow-templates API from B3 — 2 operation(s) for workflow-templates.
B3 Workflows API
The Workflows API from B3 — 22 operation(s) for workflows.
B3 X402 Endpoints API
The X402 Endpoints API from B3 — 9 operation(s) for x402 endpoints.
Scroll within the panel for all 37 ·
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.
b3-mcp.yml
MCP SERVEREvent Specifications 1
Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.
AsyncAPI definitions for this provider's event-driven and streaming APIs.
B3 B3Os Webhooks
ASYNCAPISecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
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.
Resources
Every other property we hold for B3 — 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 4
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 4
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 7
Pagination, idempotency, versioning, errors, and events
Scroll within the panel for all 7 ·
Build 3
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 2
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 2
The organization behind the API
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