Bolsai

Brazilian financial-market data REST API serving equities, real-estate funds (FIIs), fundamentals, dividends, financial statements, and macroeconomic series sourced from official feeds (B3, CVM, BCB). Covers 350+ B3 stocks, 400+ FIIs and 40 years of price history, with an official MCP server (hosted OAuth endpoint and PyPI package) for AI agents.

Bolsai publishes 1 API on the APIs.io network: Financial Data API. Tagged areas include Finance, Financial Data, Market Data, Stocks/equities, and Real Estate Funds.

Bolsai’s developer surface includes authentication, engineering blog, pricing, support, and 4 more developer resources.

🌐 Visit website 📡 Source on GitHub

33.8/100 thin ▬ flat Agent 25/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemiumSelf serveFree trial⚡ Free to try

2 APIs 1 MCP Servers

Finance Financial Data Market Data Stocks/equitiesReal Estate FundsDividends FundamentalsMacroeconomic DataBrazil Developer Tools MCP AI Agents

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 33.8/100 · thin

Contract Quality 5.0 / 19

Developer Ergonomics 5.6 / 15

Access Clarity 5.5 / 15

Operational Transparency 2.1 / 10

Contract Governance 1.6 / 9

Discoverability 5.7 / 8

Regulatory Posture 5.7 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 25/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 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

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/.

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 github.com/api-evangelist/bolsai: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

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

Bolsai Financial Data API

REST/JSON API for Brazilian financial-market data — equities, FIIs, fundamentals, dividends, financial statements, and macro series. Authenticated via X-API-Key header.

MCP Servers 1

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

Bolsai MCP Server

Official Bolsai MCP server exposing Brazilian financial-market data (B3 stocks, FIIs, fundamentals, dividends, CVM financial statements, BCB macro series) to MCP clients. Availa...

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Bolsai Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Bolsai Rate Limits

2 limits

RATE LIMITS

Security Posture 2

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

Bolsai Authentication

apiKey/oauth2 · 4 schemes

SECURITY

Bolsai Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

Build 1

SDKs, sample code, and the tooling you integrate with

Packages

Packages

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 1

Pricing, plans, and the legal terms of use

Pricing

Pricing

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted SaaS API on api.usebolsai.com with free and paid plans
  confidence: high
  source:
  - https://usebolsai.com/llms.txt
  - https://usebolsai.com/#pricing
  generated: '2026-09-03'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: true
  try_now: true
  public: true
  label: Self-serve freemium — Google login, free 200 req/day tier, in-browser playground
  confidence: high
  source:
  - https://usebolsai.com/#pricing
  - https://usebolsai.com/#playground
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/bolsai.png
name: Bolsai
description: Brazilian financial-market data REST API serving equities, real-estate funds (FIIs), fundamentals, dividends,
  financial statements, and macroeconomic series sourced from official feeds (B3, CVM, BCB). Covers 350+ B3 stocks, 400+ FIIs
  and 40 years of price history, with an official MCP server (hosted OAuth endpoint and PyPI package) for AI agents.
url: https://raw.githubusercontent.com/api-evangelist/bolsai/refs/heads/main/apis.yml
created: '2026-07-06'
modified: '2026-09-03'
specificationVersion: '0.23'
tags:
- Finance
- Financial Data
- Market Data
- Stocks/equities
- Real Estate Funds
- Dividends
- Fundamentals
- Macroeconomic Data
- Brazil
- Developer Tools
- MCP
- AI Agents
tags_raw:
- finance
- financial-data
- market-data
- stocks-equities
- real-estate-funds
- dividends
- fundamentals
- macroeconomic-data
- brazil
- developer-tools
- mcp
- ai-agents
apis:
- name: Bolsai Financial Data API
  description: REST/JSON API for Brazilian financial-market data — equities, FIIs, fundamentals, dividends, financial statements,
    and macro series. Authenticated via X-API-Key header.
  humanURL: https://usebolsai.com/docs
  baseURL: https://api.usebolsai.com/api/v1
  tags:
  - Finance
  - Financial Data
  - Market Data
  - Stocks/equities
  - Real Estate Funds
  - Dividends
  - Fundamentals
  - Macroeconomic Data
  - Brazil
  - Developer Tools
  - MCP
  - AI Agents
  tags_raw:
  - finance
  - financial-data
  - market-data
  - stocks-equities
  - real-estate-funds
  - dividends
  - fundamentals
  - macroeconomic-data
  - brazil
  - developer-tools
  - mcp
  - ai-agents
  properties:
  - type: OpenAPI
    url: https://usebolsai.com/openapi.json
  - type: Documentation
    url: https://usebolsai.com/docs
  - type: LLMSTxt
    url: https://usebolsai.com/llms.txt
  - type: OpenAPI
    url: openapi/bolsai-openapi.json
  - type: LLMsTxt
    url: llms/bolsai-llms.txt
  - type: MCPServer
    url: mcp/bolsai-mcp.yml
  - type: ToolCrosswalk
    url: mcp/bolsai-tool-crosswalk.yml
  - type: Overlay
    url: overlays/bolsai-openapi-overlay.yaml
  - type: ErrorCatalog
    url: errors/bolsai-problem-types.yml
  - type: RateLimits
    url: rate-limits/bolsai-rate-limits.yml
  - type: Plans
    url: plans/bolsai-plans-pricing.yml
  - type: Sandbox
    url: sandbox/bolsai-sandbox.yml
  - type: DataModel
    url: data-model/bolsai-data-model.yml
  - type: Conventions
    url: conventions/bolsai-conventions.yml
  - type: Lifecycle
    url: lifecycle/bolsai-lifecycle.yml
  - type: Conformance
    url: conformance/bolsai-conformance.yml
  - type: AgentSkill
    url: skills/_index.yml
maintainers:
- FN: Bolsai
  email: vinicius.lazzari@usebolsai.com
  url: https://usebolsai.com
generated:
  by: apis.io/add
  model: claude-opus-4-8
  confidence: 90
  at: '2026-07-06T15:21:36.821Z'
common:
- type: Website
  url: https://www.usebolsai.com/
- type: DomainSecurity
  url: security/bolsai-domain-security.yml
- type: Authentication
  url: authentication/bolsai-authentication.yml
- type: Packages
  url: packages/bolsai-packages.yml
- type: WellKnown
  url: well-known/bolsai-well-known.yml
- type: Blog
  url: https://usebolsai.com/blog
- type: Pricing
  url: https://usebolsai.com/#pricing
- type: Support
  url: mailto:vinicius.lazzari@usebolsai.com
x-enrichment:
  date: '2026-09-03'
  status: enriched
  artifacts_added: 26
  pass: local-v1

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