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 17 more developer resources.

🌐 Visit website 📡 Source on GitHub

46.5/100 developing ▬ flat Agent 32/100 agent aware Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0

AccessSelf serve

5 APIs 1 MCP Servers

CompanyPersonal FinanceMoney ManagementBudgetingBankingFintechFinancial DataTransactionInvestmentsExpense Tracking

Kin Score

Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0

Composite quality — 46.5/100 · developing

Contract Quality 11.8 / 21

Developer Ergonomics 8.0 / 17

Access Clarity 10.3 / 17

Operational Transparency 0.0 / 11

Contract Governance 1.7 / 10

Discoverability 6.9 / 9

Regulatory Posture 5.7 / 15

Agent readiness — 32/100 · 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

Regulatory Posture applies to this provider. Its tags matched the Banking & Open Finance 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.

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/.

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.

MCP Servers 1

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

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

SignUp

SignUp

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

MCPServer

LLMsTxt

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

DataModel

ErrorCatalog

Conformance

Lifecycle

Access & Security 4

Authentication, authorization, and security posture

TrustCenter

Compliance

Authentication

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

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

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: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Personal Finance
- Money Management
- Budgeting
- Banking
- Fintech
- Financial Data
- Transaction
- Investments
- Expense Tracking
tags_raw:
- 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:
  - Account
  tags_raw:
  - 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:
  - Transaction
  tags_raw:
  - 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: Overlay
  url: overlays/buxfer-openapi-overlay.yaml
- 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

Buxfer

Kin Score

APIs 5

Buxfer Accounts API

Buxfer Authentication API

Buxfer Organization API

Buxfer Social API

Buxfer Transactions API

Open Collections 6

API Collection

Buxfer Accounts API

Buxfer Accounts Authentication API

Buxfer Accounts Organization API

Buxfer Accounts Social API

Buxfer Accounts Transactions API

MCP Servers 1

Buxfer MCP Server

Security Posture 3

Buxfer Authentication

Buxfer Domain Security

Buxfer Trust Center

Resources