Buxfer website screenshot

Buxfer

Buxfer is a personal finance and money management platform that consolidates bank, investment and retirement accounts in one place. It connects to 20,000+ banks across 70+ countries, tracks assets in 100+ currencies, and provides budgeting with real-time alerts, expense forecasting, net-worth projection, automatic transaction tagging with custom rules, investment and retirement planning, shared-expense groups, and encrypted cloud backups to Dropbox, Google Drive or OneDrive. Buxfer exposes a JSON HTTP API for reading accounts, transactions, tags, budgets, reminders, groups, contacts and loans, and for creating, editing and deleting transactions and uploading statements. Authentication uses a login call that returns an ephemeral token passed on every subsequent request. Buxfer is a Y Combinator company.

Buxfer publishes 5 APIs on the APIs.io network, including Accounts API, Authentication API, Organization API, and 2 more. Tagged areas include Company, Personal Finance, Money Management, Budgeting, and Banking.

Buxfer’s developer surface includes documentation, API reference, support, engineering blog, pricing, signup flow, authentication, and 16 more developer resources.

🌐 Visit website 📡 Source on GitHub
50.8/100 developing ▬ flat Agent 55/100 agent ready Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessSelf serve
5 APIs 1 MCP Servers
CompanyPersonal FinanceMoney ManagementBudgetingBankingFintechFinancial DataTransactionsInvestmentsExpense Tracking

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 50.8/100 · developing
Contract Quality 14.9 / 25
Developer Ergonomics 11.3 / 20
Commercial Clarity 12.1 / 20
Operational Transparency 0.0 / 13
Governance 0.0 / 12
Discoverability 10.0 / 10
Agent readiness — 55/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 15
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 0 / 7
Typed Event Surface 0 / 6
Agent Skills 5 / 5
Well-Known Catalog 4 / 4
Consent & Bot Identity 0 / 3
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/buxfer: 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 5

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

Buxfer Accounts API

List accounts and balances.

Buxfer Authentication API

Obtain an ephemeral API token.

Buxfer Organization API

Tags, budgets, reminders.

Buxfer Social API

Groups, contacts and loans for shared expenses.

Buxfer Transactions API

Create, edit, delete, list and import transactions.

MCP Servers 1

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

buxfer-mcp.yml

MCP SERVER

Security Posture 3

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

Buxfer Authentication

apiKey · 1 scheme

SECURITY

Buxfer Domain Security

TLSv1.2 · HSTS

SECURITY

Buxfer Trust Center

ISO 27001, PCI DSS

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 SignUp
SignUp
 Login
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
 MCPServer
MCPServer
 LLMsTxt
LLMsTxt
 AgentSkill
AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 DataModel
DataModel
 ErrorCatalog
ErrorCatalog
 Conformance
Conformance
 Lifecycle
Lifecycle

Access & Security 4

Authentication, authorization, and security posture

TrustCenter
TrustCenter
 Compliance
Compliance
 Authentication
Authentication
 DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support
Support

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 1

The organization behind the API

Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: buxfer
name: Buxfer
description: Buxfer is a personal finance and money management platform that consolidates bank, investment and retirement
  accounts in one place. It connects to 20,000+ banks across 70+ countries, tracks assets in 100+ currencies, and provides
  budgeting with real-time alerts, expense forecasting, net-worth projection, automatic transaction tagging with custom rules,
  investment and retirement planning, shared-expense groups, and encrypted cloud backups to Dropbox, Google Drive or OneDrive.
  Buxfer exposes a JSON HTTP API for reading accounts, transactions, tags, budgets, reminders, groups, contacts and loans,
  and for creating, editing and deleting transactions and uploading statements. Authentication uses a login call that returns
  an ephemeral token passed on every subsequent request. Buxfer is a Y Combinator company.
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://www.buxfer.com/favicon.ico
url: https://raw.githubusercontent.com/api-evangelist/buxfer/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: profiled
x-tier-reason: portfolio-lead-enriched
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Personal Finance
- Money Management
- Budgeting
- Banking
- Fintech
- Financial Data
- Transactions
- Investments
- Expense Tracking
apis:
- aid: buxfer:buxfer-accounts-api
  name: Buxfer Accounts API
  description: List accounts and balances.
  humanURL: https://www.buxfer.com/help/api
  baseURL: https://www.buxfer.com/api
  tags:
  - Accounts
  properties:
  - type: OpenAPI
    url: openapi/buxfer-accounts-api-openapi.yml
  - type: Authentication
    url: authentication/buxfer-authentication.yml
  - type: Conventions
    url: conventions/buxfer-conventions.yml
  - type: ErrorCatalog
    url: errors/buxfer-problem-types.yml
  - type: DataModel
    url: data-model/buxfer-data-model.yml
  - type: Conformance
    url: conformance/buxfer-conformance.yml
  - type: Lifecycle
    url: lifecycle/buxfer-lifecycle.yml
- aid: buxfer:buxfer-authentication-api
  name: Buxfer Authentication API
  description: Obtain an ephemeral API token.
  humanURL: https://www.buxfer.com/help/api
  baseURL: https://www.buxfer.com/api
  tags:
  - Authentication
  properties:
  - type: OpenAPI
    url: openapi/buxfer-authentication-api-openapi.yml
  - type: Authentication
    url: authentication/buxfer-authentication.yml
  - type: Conventions
    url: conventions/buxfer-conventions.yml
  - type: ErrorCatalog
    url: errors/buxfer-problem-types.yml
  - type: DataModel
    url: data-model/buxfer-data-model.yml
  - type: Conformance
    url: conformance/buxfer-conformance.yml
  - type: Lifecycle
    url: lifecycle/buxfer-lifecycle.yml
- aid: buxfer:buxfer-organization-api
  name: Buxfer Organization API
  description: Tags, budgets, reminders.
  humanURL: https://www.buxfer.com/help/api
  baseURL: https://www.buxfer.com/api
  tags:
  - Organization
  properties:
  - type: OpenAPI
    url: openapi/buxfer-organization-api-openapi.yml
  - type: Authentication
    url: authentication/buxfer-authentication.yml
  - type: Conventions
    url: conventions/buxfer-conventions.yml
  - type: ErrorCatalog
    url: errors/buxfer-problem-types.yml
  - type: DataModel
    url: data-model/buxfer-data-model.yml
  - type: Conformance
    url: conformance/buxfer-conformance.yml
  - type: Lifecycle
    url: lifecycle/buxfer-lifecycle.yml
- aid: buxfer:buxfer-social-api
  name: Buxfer Social API
  description: Groups, contacts and loans for shared expenses.
  humanURL: https://www.buxfer.com/help/api
  baseURL: https://www.buxfer.com/api
  tags:
  - Social
  properties:
  - type: OpenAPI
    url: openapi/buxfer-social-api-openapi.yml
  - type: Authentication
    url: authentication/buxfer-authentication.yml
  - type: Conventions
    url: conventions/buxfer-conventions.yml
  - type: ErrorCatalog
    url: errors/buxfer-problem-types.yml
  - type: DataModel
    url: data-model/buxfer-data-model.yml
  - type: Conformance
    url: conformance/buxfer-conformance.yml
  - type: Lifecycle
    url: lifecycle/buxfer-lifecycle.yml
- aid: buxfer:buxfer-transactions-api
  name: Buxfer Transactions API
  description: Create, edit, delete, list and import transactions.
  humanURL: https://www.buxfer.com/help/api
  baseURL: https://www.buxfer.com/api
  tags:
  - Transactions
  properties:
  - type: OpenAPI
    url: openapi/buxfer-transactions-api-openapi.yml
  - type: Authentication
    url: authentication/buxfer-authentication.yml
  - type: Conventions
    url: conventions/buxfer-conventions.yml
  - type: ErrorCatalog
    url: errors/buxfer-problem-types.yml
  - type: DataModel
    url: data-model/buxfer-data-model.yml
  - type: Conformance
    url: conformance/buxfer-conformance.yml
  - type: Lifecycle
    url: lifecycle/buxfer-lifecycle.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: TrustCenter
  url: security/buxfer-trust-center.yml
- type: Compliance
  url: https://www.buxfer.com/help/security
- type: WellKnown
  url: well-known/buxfer-well-known.yml
- type: DeveloperPortal
  url: https://www.buxfer.com/help/api
- type: Documentation
  url: https://www.buxfer.com/help/api
- type: APIReference
  url: https://www.buxfer.com/help/api
- type: Support
  url: https://www.buxfer.com/help/
- type: Blog
  url: https://blog.buxfer.com
- type: Pricing
  url: https://www.buxfer.com/pricing/
- type: SignUp
  url: https://www.buxfer.com/signup/
- type: Login
  url: https://www.buxfer.com/login/
- type: TermsOfService
  url: https://www.buxfer.com/terms/
- type: PrivacyPolicy
  url: https://www.buxfer.com/privacy/
- type: Authentication
  url: authentication/buxfer-authentication.yml
- type: Conventions
  url: conventions/buxfer-conventions.yml
- type: DataModel
  url: data-model/buxfer-data-model.yml
- type: ErrorCatalog
  url: errors/buxfer-problem-types.yml
- type: Conformance
  url: conformance/buxfer-conformance.yml
- type: Lifecycle
  url: lifecycle/buxfer-lifecycle.yml
- type: MCPServer
  url: mcp/buxfer-mcp.yml
- type: LLMsTxt
  url: llms/buxfer-llms.txt
- type: AgentSkill
  url: skills/_index.yml
- type: DomainSecurity
  url: security/buxfer-domain-security.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence