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 — 116 machine-readable artifacts across 3 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 50.3/100 (developing), with a separate agent-readiness read of 29/100 (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. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
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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 72
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.
B3 Activity API
The activity API from B3 — 1 operation(s) for activity.
B3 Agent Runs API
The agent-runs API from B3 — 4 operation(s) for agent-runs.
B3 App Gateway API
The App Gateway API from B3 — 5 operation(s) for app gateway.
B3 Block Cursors API
The Block Cursors API from B3 — 1 operation(s) for block cursors.
B3 Blockscout API
General Blockscout endpoints
B3 Blockscout/blocks API
Blockscout block data
B3 Blockscout/main Page API
Blockscout main page data
B3 Blockscout/search API
Blockscout search functionality
B3 Blockscout/stats API
Blockscout statistics and charts
B3 Blockscout/tokens API
Blockscout token and transfer data
B3 Blockscout/transactions API
Blockscout transaction data
B3 Execution Webhooks API
The Execution Webhooks API from B3 — 9 operation(s) for execution webhooks.
B3 Executions API
The Executions API from B3 — 7 operation(s) for executions.
B3 Incentive API
The incentive API from B3 — 2 operation(s) for incentive.
B3 Insights/blocks API
ThirdWeb Insights block data
B3 Insights/contracts API
ThirdWeb Insights contract analytics
B3 Insights/decode API
ThirdWeb Insights transaction decoding
B3 Insights/events API
ThirdWeb Insights event data
B3 Insights/nfts API
ThirdWeb Insights NFT analytics
B3 Insights/resolve API
ThirdWeb Insights ENS resolution
B3 Insights/tokens API
ThirdWeb Insights token analytics
B3 Insights/transactions API
ThirdWeb Insights transaction analytics
B3 Insights/wallets API
ThirdWeb Insights wallet analytics
B3 MCP API
The Mcp API from B3 — 2 operation(s) for mcp.
B3 Mcp Connectors API
The Mcp Connectors API from B3 — 1 operation(s) for mcp connectors.
B3 Run API
The Run API from B3 — 1 operation(s) for run.
B3 Service Accounts API
The Service Accounts API from B3 — 4 operation(s) for service accounts.
B3 Sessions API
The sessions API from B3 — 2 operation(s) for sessions.
B3 Situation API
The Situation API from B3 — 1 operation(s) for situation.
B3 Sms API
The Sms API from B3 — 6 operation(s) for sms.
B3 Tiers API
The Tiers API from B3 — 1 operation(s) for tiers.
B3 User API
The user API from B3 — 3 operation(s) for user.
B3 Webhook API
The Webhook API from B3 — 1 operation(s) for webhook.
B3 Workflow API
The workflow API from B3 — 1 operation(s) for workflow.
B3 Workflow Variables API
The WorkflowVariables API from B3 — 6 operation(s) for workflowvariables.
Scroll within the panel for all 72 ·
Open Collections 40
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.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
API Collection
OPEN COLLECTIONB3OS Workflow Action API
OPEN COLLECTIONB3OS Workflow Action Actions API
OPEN COLLECTIONB3OS Workflow Action Admin API
OPEN COLLECTIONB3OS Workflow Action Ai API
OPEN COLLECTIONB3OS Workflow Action Api Keys API
OPEN COLLECTIONB3OS Workflow API
OPEN COLLECTIONB3OS Workflow Action Connector Types API
OPEN COLLECTIONB3OS Workflow Action Connectors API
OPEN COLLECTIONB3OS Workflow Action Contract API
OPEN COLLECTIONB3OS Workflow Action Contracts API
OPEN COLLECTIONB3OS Workflow Action CU API
OPEN COLLECTIONB3 Data API - Multi-Chain Data API
OPEN COLLECTIONB3OS Workflow Action faucet API
OPEN COLLECTIONB3OS Workflow Action Integrations API
OPEN COLLECTIONB3OS Workflow Action Internal API
OPEN COLLECTIONB3OS Workflow Action Invites API
OPEN COLLECTIONB3OS Workflow Action Logic Actions API
OPEN COLLECTIONB3OS Workflow Action Metrics API
OPEN COLLECTIONB3OS Workflow Action onboarding API
OPEN COLLECTIONB3OS Workflow Action Organization Storage API
OPEN COLLECTIONB3OS Workflow Action Organizations API
OPEN COLLECTIONB3OS Workflow Action Orgs API
OPEN COLLECTIONB3OS Workflow Action Outbound Webhook API
OPEN COLLECTIONB3OS Workflow Action Pipedream API
OPEN COLLECTIONB3OS Workflow Action Public API
OPEN COLLECTIONB3OS Workflow Action Runs API
OPEN COLLECTIONB3OS Workflow Action Search API
OPEN COLLECTIONB3OS Workflow Action seo API
OPEN COLLECTIONB3OS Workflow Action Statistics API
OPEN COLLECTIONB3OS Workflow Action tags API
OPEN COLLECTIONB3OS Workflow Action Telegram Bot API
OPEN COLLECTIONB3OS Workflow Action Templates API
OPEN COLLECTIONB3OS Workflow Action Token Price Cexes API
OPEN COLLECTIONB3OS Workflow Action Triggers API
OPEN COLLECTIONB3OS Workflow Action wallets API
OPEN COLLECTIONB3OS Workflow Action Webhook Events API
OPEN COLLECTIONB3OS Workflow Action workflow-templates API
OPEN COLLECTIONB3OS Workflow Action Workflows API
OPEN COLLECTIONB3OS Workflow Action X402 Endpoints API
OPEN COLLECTIONScroll within the panel for all 40 ·
Event 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
Other 2
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/b3 · machine-readable index on apis.io
This is an independent, third-party profile of B3, 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.
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