B3 (Brasil Bolsa Balcão)

B3 S.A. - Brasil, Bolsa, Balcão is the Brazilian exchange and financial market infrastructure operator formed by the 2017 merger of BM&FBOVESPA and Cetip, running trading, clearing, central depository, and OTC registration for equities, derivatives, fixed income, and FX. Its public B3 for Developers portal documents 114 B2B REST APIs (OAuth 2.0 client credentials and ROPC) across investor-area, OTC (Balcão), listed-markets, Tesouro Direto, Banco B3, and insurance domains. Real-time market data is distributed through the UMDF multicast feed (FIX/FAST and Binary SBE, L1/L2) via authorized distributors, and end-of-day plus reference data through the UP2DATA file service (TXT/CSV/JSON/XML via client software or cloud). All API and data access is contract-gated for institutions - B3 explicitly offers no self-serve access for individuals.

B3 (Brasil Bolsa Balcão) is listed with 10 APIs on the APIs.io network, including B3 Investor Area (Área do Investidor) APIs, B3 Tesouro Direto APIs, B3 OTC (Balcão) APIs, and 7 more. Tagged areas include Finance, Market Data, Stocks, Trading, and Exchange.

B3 (Brasil Bolsa Balcão)’s developer surface includes developer portal, documentation, support, authentication, sandbox, changelog, API reference, and 21 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

38.7/100 thin ▬ flat Agent 19/100 agent aware saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessSelf serve

10 APIs 3 Agent Skills

Finance Market Data Stocks Trading Exchange Derivatives Fixed Income Real-Time Reference Data Brazil

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 38.7/100 · thin

Contract Quality 5.1 / 21

Developer Ergonomics 10.8 / 17

Access Clarity 4.7 / 17

Operational Transparency 2.9 / 11

Contract Governance 1.9 / 10

Discoverability 5.3 / 9

Regulatory Posture 5.7 / 15

Agent readiness — 19/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 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 0 / 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 5 / 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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% 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
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

9 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 24.0 — up to +19.0 composite points
Access Clarity scores 27.6 — up to +14.5 composite points
Contract Governance scores 18.2 — up to +9.8 composite points

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.

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/b3-exchange/apis.yml: open an issue on github.com/api-evangelist/b3-exchange 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 2

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)

OAuth 2.0

measured — observed by APIs.io (declared)

APIs 10

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

B3 Investor Area (Área do Investidor) APIs

D-1 investor data for authorized fintechs and custodians - investment positions, account transactions, listed-asset buy/sell activity, public offering participation, and provisi...

B3 Tesouro Direto APIs

Treasury Direct platform APIs - the Bonds API serves reference data for Brazilian public bonds (name, maturity, Selic code, platform identifiers), Positions serves investor posi...

B3 OTC (Balcão) APIs

Registration, custody, and consultation APIs for the OTC segment - bank funding instruments (CDB, RDB, LCA, LCI, LF, LIG), credit notes (CCB, CPR, NC), OTC derivatives (swaps, f...

B3 Listed Markets (Listados) APIs

Post-trade APIs for the listed segment - iMercado investment fund registration and equities fee details, CORE risk calculation and simulation, unified client registration, asset...

B3 ISIN API

ISIN issuance and management for financial instruments - B3 is the Brazilian numbering agency - covering ISIN requests, updates, and consultation of instrument identifier records.

Banco B3 APIs

Banco B3 Custody API for operation billing, position reports, and fund quote validation, plus the Settlement API for Pix statement consultation.

B3 Insurance (Seguros) APIs

Insurance-segment registration APIs (V3) covering accepted co-insurance registration, claim registration, document registration, and batch processing return with data-quality fe...

B3 Authentication APIs

OAuth 2.0 token issuance APIs used across the B3 API catalog - Client Credentials flows (plain, plus category_ID, key, or scope parameter variants) and Resource Owner Password C...

B3 Market Data Feed (UMDF)

B3's real-time market data distribution over the Unified Market Data Feed (UMDF) - event-based bid, ask, trade, and statistics data in L1 (top of book) or L2 (full book) depth, ...

B3 UP2DATA

DERIVED

B3 Exchange Tesouro Direto Positions Overlay

2 actions · update · b3-exchange-tesouro-direto-positions-openapi.json

DERIVED

Scroll for all 14

Security Posture 3

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

B3 Exchange Authentication

oauth2 · 3 schemes

SECURITY

B3 Exchange Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

B3 Exchange Vulnerability Disclosure

security.txt · contact published

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

B3 Exchange Scopes

2 scopes · clientCredentials/password

2 scopes

SCOPES

Resources

Get Started 4

Portal, sign-up, and the first successful call

Portal

Portal

Sandbox

Sandbox

GettingStarted

GettingStarted

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

WellKnown

WellKnown

X-MCPServerCandidate

X-MCPServerCandidate

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conformance

ErrorCatalog

Lifecycle

Conventions

DataModel

Build 1

SDKs, sample code, and the tooling you integrate with

Packages

Packages

Access & Security 6

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

SecurityTxt

OAuthScopes

Authentication

Security

Operate 2

Status, limits, changes, and where to get help

Support

Support

ChangeLog

ChangeLog

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

LinkedIn

Source (apis.yml)

aid: b3-exchange
url: https://raw.githubusercontent.com/api-evangelist/b3-exchange/refs/heads/main/apis.yml
name: B3 (Brasil Bolsa Balcão)
kind: company
description: B3 S.A. - Brasil, Bolsa, Balcão is the Brazilian exchange and financial market infrastructure operator formed
  by the 2017 merger of BM&FBOVESPA and Cetip, running trading, clearing, central depository, and OTC registration for equities,
  derivatives, fixed income, and FX. Its public B3 for Developers portal documents 114 B2B REST APIs (OAuth 2.0 client credentials
  and ROPC) across investor-area, OTC (Balcão), listed-markets, Tesouro Direto, Banco B3, and insurance domains. Real-time
  market data is distributed through the UMDF multicast feed (FIX/FAST and Binary SBE, L1/L2) via authorized distributors,
  and end-of-day plus reference data through the UP2DATA file service (TXT/CSV/JSON/XML via client software or cloud). All
  API and data access is contract-gated for institutions - B3 explicitly offers no self-serve access for individuals.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  - security
  - sandbox
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Finance
- Market Data
- Stocks
- Trading
- Exchange
- Derivatives
- Fixed Income
- Real-Time
- Reference Data
- Brazil
tags_raw:
- Financial
- Market Data
- Stocks
- Trading
- Exchange
- Derivatives
- Fixed Income
- Real-Time
- Reference Data
- Brazil
created: '2026-07-21'
modified: '2026-07-22'
specificationVersion: '0.23'
apis:
- aid: b3-exchange:b3-investor-area-apis
  name: B3 Investor Area (Área do Investidor) APIs
  tags:
  - investor-data
  - Positions
  - Transaction
  tags_raw:
  - Investor Data
  - Positions
  - Transactions
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developers.b3.com.br/apis/api-area-do-investidor
  baseURL: https://developers.b3.com.br:8065
  properties:
  - url: https://developers.b3.com.br/apis/api-area-do-investidor
    type: Documentation
  - url: openapi/b3-exchange-investor-position-openapi.json
    type: OpenAPI
  - url: openapi/b3-exchange-investor-transactions-openapi.json
    type: OpenAPI
  - type: Overlay
    url: overlays/b3-exchange-investor-position-overlay.yaml
  - type: Overlay
    url: overlays/b3-exchange-investor-transactions-overlay.yaml
  description: D-1 investor data for authorized fintechs and custodians - investment positions, account transactions, listed-asset
    buy/sell activity, public offering participation, and provisioned corporate events - under OAuth 2.0 with investor consent
    flows (STVM request/response authorization).
- aid: b3-exchange:b3-tesouro-direto-apis
  name: B3 Tesouro Direto APIs
  tags:
  - Government Bonds
  - Reference Data
  - Positions
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developers.b3.com.br/apis/tesouro-direto
  baseURL: https://developers.b3.com.br:8065
  properties:
  - url: https://developers.b3.com.br/apis/tesouro-direto
    type: Documentation
  - url: openapi/b3-exchange-tesouro-direto-bonds-openapi.json
    type: OpenAPI
  - url: openapi/b3-exchange-tesouro-direto-positions-openapi.json
    type: OpenAPI
  - type: OpenAPI
    url: openapi/b3-exchange-tesouro-direto-orders-openapi.json
  - type: Overlay
    url: overlays/b3-exchange-tesouro-direto-bonds-overlay.yaml
  - type: Overlay
    url: overlays/b3-exchange-tesouro-direto-positions-overlay.yaml
  - type: Overlay
    url: overlays/b3-exchange-tesouro-direto-orders-overlay.yaml
  description: Treasury Direct platform APIs - the Bonds API serves reference data for Brazilian public bonds (name, maturity,
    Selic code, platform identifiers), Positions serves investor position balances, and Orders covers operations on the Tesouro
    Direto platform.
- aid: b3-exchange:b3-otc-balcao-apis
  name: B3 OTC (Balcão) APIs
  tags:
  - OTC
  - Fixed Income
  - Registration
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developers.b3.com.br/apis/api-balcao
  baseURL: https://developers.b3.com.br:8065
  properties:
  - url: https://developers.b3.com.br/apis/api-balcao
    type: Documentation
  - url: openapi/b3-exchange-otc-public-info-openapi.json
    type: OpenAPI
  - type: Overlay
    url: overlays/b3-exchange-otc-public-info-overlay.yaml
  description: Registration, custody, and consultation APIs for the OTC segment - bank funding instruments (CDB, RDB, LCA,
    LCI, LF, LIG), credit notes (CCB, CPR, NC), OTC derivatives (swaps, flexible options, term contracts), liens and collateral,
    plus the NoMe Public-Info API for OTC public information consultation.
- aid: b3-exchange:b3-listed-markets-apis
  name: B3 Listed Markets (Listados) APIs
  tags:
  - Post-Trade
  - Risk Management
  - Fund
  tags_raw:
  - Post-Trade
  - Risk
  - Funds
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developers.b3.com.br/apis/api-listados
  baseURL: https://developers.b3.com.br:8065
  properties:
  - url: https://developers.b3.com.br/apis/api-listados
    type: Documentation
  - type: OpenAPI
    url: openapi/b3-exchange-core-calculation-openapi.json
  - type: OpenAPI
    url: openapi/b3-exchange-securities-lending-openapi.json
  - type: Overlay
    url: overlays/b3-exchange-core-calculation-overlay.yaml
  - type: Overlay
    url: overlays/b3-exchange-securities-lending-overlay.yaml
  description: Post-trade APIs for the listed segment - iMercado investment fund registration and equities fee details, CORE
    risk calculation and simulation, unified client registration, asset lending, reconciliation files, and guarantee management
    report data.
- aid: b3-exchange:b3-isin-api
  name: B3 ISIN API
  tags:
  - ISIN
  - Reference Data
  - Identifiers
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developers.b3.com.br/api-details?apiId=78646d15-2690-42df-9822-93e2860fe708&managerId=1&swaggerVersion=2.0&type=rest&usage=api&Itemid=171
  baseURL: https://developers.b3.com.br:8065
  properties:
  - url: https://developers.b3.com.br/api-details?apiId=78646d15-2690-42df-9822-93e2860fe708&managerId=1&swaggerVersion=2.0&type=rest&usage=api&Itemid=171
    type: Documentation
  - url: openapi/b3-exchange-isin-openapi.json
    type: OpenAPI
  - type: Overlay
    url: overlays/b3-exchange-isin-overlay.yaml
  description: ISIN issuance and management for financial instruments - B3 is the Brazilian numbering agency - covering ISIN
    requests, updates, and consultation of instrument identifier records.
- aid: b3-exchange:b3-banco-b3-apis
  name: Banco B3 APIs
  tags:
  - Banking
  - Custody
  - Settlement
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developers.b3.com.br/apis/bancob3
  baseURL: https://developers.b3.com.br:8065
  properties:
  - url: https://developers.b3.com.br/apis/bancob3
    type: Documentation
  - type: OpenAPI
    url: openapi/b3-exchange-banco-b3-custody-openapi.json
  - type: OpenAPI
    url: openapi/b3-exchange-banco-b3-settlement-openapi.json
  - type: Overlay
    url: overlays/b3-exchange-banco-b3-custody-overlay.yaml
  - type: Overlay
    url: overlays/b3-exchange-banco-b3-settlement-overlay.yaml
  description: Banco B3 Custody API for operation billing, position reports, and fund quote validation, plus the Settlement
    API for Pix statement consultation.
- aid: b3-exchange:b3-insurance-apis
  name: B3 Insurance (Seguros) APIs
  tags:
  - Insurance
  - Claims
  - Registration
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developers.b3.com.br/apis/seguros
  baseURL: https://developers.b3.com.br:8065
  properties:
  - url: https://developers.b3.com.br/apis/seguros
    type: Documentation
  - type: OpenAPI
    url: openapi/b3-exchange-insurance-claim-openapi.json
  - type: Overlay
    url: overlays/b3-exchange-insurance-claim-overlay.yaml
  description: Insurance-segment registration APIs (V3) covering accepted co-insurance registration, claim registration, document
    registration, and batch processing return with data-quality feedback.
- aid: b3-exchange:b3-authentication-apis
  name: B3 Authentication APIs
  tags:
  - Authentication
  - OAuth
  tags_raw:
  - Authentication
  - OAuth
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developers.b3.com.br/apis/autenticacao
  baseURL: https://developers.b3.com.br:8065
  properties:
  - url: https://developers.b3.com.br/apis/autenticacao
    type: Documentation
  - type: OpenAPI
    url: openapi/b3-exchange-auth-client-credentials-openapi.json
  - type: OpenAPI
    url: openapi/b3-exchange-auth-ropc-openapi.json
  - type: Overlay
    url: overlays/b3-exchange-auth-client-credentials-overlay.yaml
  - type: Overlay
    url: overlays/b3-exchange-auth-ropc-overlay.yaml
  description: OAuth 2.0 token issuance APIs used across the B3 API catalog - Client Credentials flows (plain, plus category_ID,
    key, or scope parameter variants) and Resource Owner Password Credentials flows.
- aid: b3-exchange:b3-market-data-feed-umdf
  name: B3 Market Data Feed (UMDF)
  tags:
  - Real-Time
  - Market Data
  - Order Book
  - Multicast
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.b3.com.br/en_us/market-data-and-indices/data-services/market-data/
  properties:
  - url: https://www.b3.com.br/en_us/market-data-and-indices/data-services/market-data/
    type: Documentation
  - url: https://www.b3.com.br/data/files/A4/11/B5/27/B1C6C6106B9896C6DC0D8AA8/UMDF_MarketDataSpecification_v2.1.7.pdf
    type: Documentation
  description: B3's real-time market data distribution over the Unified Market Data Feed (UMDF) - event-based bid, ask, trade,
    and statistics data in L1 (top of book) or L2 (full book) depth, real-time or 15-minute delayed, delivered as FIX/FAST
    and lower-latency Binary SBE multicast streams to authorized distributors and direct connections under commercial contract.
    Not an HTTP API.
- aid: b3-exchange:b3-up2data
  name: B3 UP2DATA
  tags:
  - End of Day
  - Reference Data
  - File
  tags_raw:
  - End of Day
  - Reference Data
  - Files
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.b3.com.br/en_us/market-data-and-indices/data-services/up2data/
  properties:
  - url: https://www.b3.com.br/en_us/market-data-and-indices/data-services/up2data/
    type: Documentation
  - url: https://www.b3.com.br/en_us/market-data-and-indices/data-services/up2data/available-data/
    type: Documentation
  description: End-of-day and reference data service covering fixed income, equities, currencies, and debentures for mark-to-market,
    risk, and pricing workflows - standardized files in TXT, CSV, JSON, or XML delivered daily at predetermined times through
    client software or a cloud environment, under commercial contract. File-based delivery, not an HTTP API.
common:
- type: VulnerabilityDisclosure
  url: security/b3-exchange-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/b3-exchange-domain-security.yml
- type: Website
  url: https://www.b3.com.br/en_us/
- type: Portal
  url: https://developers.b3.com.br/
- type: Documentation
  url: https://developers.b3.com.br/apis
- type: LinkedIn
  url: https://www.linkedin.com/company/b3
- type: TermsOfService
  url: https://www.b3.com.br/en_us/terms-of-use-and-data-protection/
- type: Support
  url: https://developers.b3.com.br/contato
- type: Packages
  url: packages/b3-exchange-packages.yml
- type: WellKnown
  url: well-known/b3-exchange-well-known.yml
- type: SecurityTxt
  url: well-known/b3-exchange-security.txt
- type: X-MCPServerCandidate
  url: mcp/b3-exchange-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/b3-exchange-llms.txt
- type: Conformance
  url: conformance/b3-exchange-conformance.yml
- type: ErrorCatalog
  url: errors/b3-exchange-problem-types.yml
- type: Lifecycle
  url: lifecycle/b3-exchange-lifecycle.yml
- type: OAuthScopes
  url: scopes/b3-exchange-scopes.yml
- type: Authentication
  url: authentication/b3-exchange-authentication.yml
- type: Conventions
  url: conventions/b3-exchange-conventions.yml
- type: Sandbox
  url: sandbox/b3-exchange-sandbox.yml
- type: ChangeLog
  url: changelog/b3-exchange-changelog.yml
- type: DataModel
  url: data-model/b3-exchange-data-model.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Security
  url: https://developers.b3.com.br/seguranca
- type: APIReference
  url: https://developers.b3.com.br/apis
- type: GettingStarted
  url: https://developers.b3.com.br/faq
- type: Login
  url: https://developers.b3.com.br/sign-in
- type: PrivacyPolicy
  url: https://www.b3.com.br/en_us/terms-of-use-and-data-protection/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

B3 (Brasil Bolsa Balcão) API — frequently asked questions

Does B3 (Brasil Bolsa Balcão) have an API?

Yes. APIs.io lists 10 APIs from B3 (Brasil Bolsa Balcão), including B3 Investor Area (Área do Investidor) APIs, B3 Tesouro Direto APIs and B3 OTC (Balcão) APIs, and 7 more.

Is there an OpenAPI specification for the B3 (Brasil Bolsa Balcão) API?

Yes. APIs.io indexes 8 OpenAPI specifications for B3 (Brasil Bolsa Balcão), each linked for download from this page.

How do I authenticate with the B3 (Brasil Bolsa Balcão) API?

B3 (Brasil Bolsa Balcão) uses bearer-token authentication (oauth2 · 3 schemes). The details are profiled on APIs.io as B3 Exchange Authentication.

Is the B3 (Brasil Bolsa Balcão) API ready for AI agents?

B3 (Brasil Bolsa Balcão) has a Kin Score of 38.7 out of 100 (thin) and an Agent Readiness score of 19.2 (agent-aware), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/b3-exchange"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/b3-exchange/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/b3-exchange/evidence"

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