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 18 more developer resources.

🌐 Visit website 📡 Source on GitHub
33.3/100 thin ▬ flat Agent 22/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0
1 APIs
CompanyPersonal FinanceMoney ManagementBudgetingBankingFintechFinancial DataTransactionInvestmentsExpense Tracking

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 33.3/100 · thin
Contract Quality 2.5 / 19
Developer Ergonomics 7.1 / 15
Access Clarity 9.1 / 15
Operational Transparency 0.0 / 10
Contract Governance 0.4 / 9
Discoverability 5.7 / 8
Regulatory Posture 5.7 / 15
Create-or-Update Ergonomics 0.0 / 10
Agent readiness — 22/100 · 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
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.
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/buxfer: 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 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.

Open Collections 6

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Buxfer Accounts API

OPEN COLLECTION

Buxfer Accounts Authentication API

OPEN COLLECTION

Buxfer Accounts Organization API

OPEN COLLECTION

Buxfer Accounts Social API

OPEN COLLECTION

Buxfer Accounts Transactions API

OPEN COLLECTION

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
 X-MCPServerCandidate
X-MCPServerCandidate
 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 2

The organization behind the API

Website
Website
 Blog
Blog

Other 1

Properties that don't map to a standard resource type

Overlay
Overlay

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.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-09-03'
  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: Website
  url: https://www.buxfer.com/
- 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: X-MCPServerCandidate
  url: mcp/buxfer-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/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

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/buxfer"
All providers 
curl "https://apis.io/api/v1/providers?limit=25"
Every operation they expose 
curl "https://apis.io/api/v1/providers/buxfer/operations?limit=25"
How their score was established 
curl "https://apis.io/api/v1/providers/buxfer/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.