# databutler-dev API

**Canonical:** https://apis.io/apis/databutler-dev/databutler-dev-api/  
**Provider:** databutler-dev — https://apis.io/providers/databutler-dev/  
**Documentation:** https://databutler.dev/api

databutler-dev API is one of 2 APIs that [databutler-dev](https://apis.io/providers/databutler-dev/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. This API exposes 1 JSON Schema definition. The published artifact set on APIs.io includes an OpenAPI specification and 1 JSON Schema.

databutler-dev API as documented publicly: 58 operations. Contract generated from the documentation by API Evangelist (2026-10-29); not the provider's own document.

## Operations (58)

| Method | Path | Summary |
|---|---|---|
| GET | `/.well-known/changes.json` | Protocol discovery document: areas tracked, cadence, endpoints (json/html/rss/atom/mcp), schema URL, licence, contact. |
| GET | `/.well-known/facts.json` | Verified Facts discovery document: namespaces, endpoints, key examples, conformance level, keys (JWKS), OpenAPI and MCP. |
| GET | `/api/calendar` | Calendar facts for 2026–2028, verified 2026-10-04: kind=holidays — public holidays by region for uk, us, de, fr from gov.uk, OPM, the German Länder and calen... |
| GET | `/api/calendar/next` | The next public holiday strictly after a date (default today) for uk, us, de, fr, with the three that follow; same snapshot as /api/calendar. |
| GET | `/api/changes` | What changed in the verified datasets since a date (REST mirror of what_changed_since). format=html\|rss\|atom serves the /changes page or feeds instead of JSON. |
| GET | `/api/de/rates` | German tax and social-insurance figures for Veranlagungszeitraum 2026, verified 2026-10-03 against the consolidated statutes, the Bundesgesetzblatt and the B... |
| GET | `/api/jp/living-costs` | Japan daily-life official figures, verified 2026-10-24 against the official pages: 地域別最低賃金 FY2026 by prefecture (with each 発効日 and the FY2025 amount), 協会けんぽ ... |
| GET | `/api/jp/vehicle-costs` | Japan vehicle statutory costs, verified 2026-10-24 against the official pages: 自動車重量税 at 車検 (2026-05-01 – 2028-04-30 table), エコカー減税 bands, 自賠責保険 for private ... |
| POST | `/api/mcp` | THE FRONT DOOR — one remote MCP server for the whole estate. Lists uk_rates_lookup, exam_topic_paper, domain_provenance, package_provenance, take_home_pay di... |
| POST | `/api/mcp/calendar` | Remote MCP server — tools calendar_facts, next_holiday (public holidays, tax years and daylight saving from the official lists and statutes, monthly snapshot). |
| POST | `/api/mcp/de-rates` | Remote MCP server — tool de_rates_lookup (German tax and social‑insurance figures, Veranlagungszeitraum 2026; committed data read from the statutes and the B... |
| POST | `/api/mcp/facts` | Remote MCP server databutler-facts — three tools: get_fact, resolve_fact, what_changed_since. |
| POST | `/api/mcp/jp-living-costs` | Remote MCP server — tool jp_living_costs_lookup. |
| POST | `/api/mcp/jp-vehicle-costs` | Remote MCP server — tool jp_vehicle_costs_lookup. |
| POST | `/api/mcp/policy-rates` | Remote MCP server — tool policy_rate (Bank of England, Fed, ECB; committed data verified against the banks' own pages). |
| POST | `/api/mcp/provenance` | Remote MCP server — tools domain_provenance, package_provenance. |
| POST | `/api/mcp/software-eol` | Remote MCP server — tools support_status, support_timeline (monthly snapshot of endoflife.date open data for 14 runtimes, operating systems, PostgreSQL and R... |
| POST | `/api/mcp/stats` | Remote MCP server — descriptive_stats, distribution, hypothesis_test, confidence_interval, bayes_update, linear_regression. |
| POST | `/api/mcp/tax` | Remote MCP server — tool take_home_pay (live via the LifeByNumbers salary calculators). |
| POST | `/api/mcp/uk-exam-dates` | Remote MCP server — tool uk_exam_dates (results days, summer timetable paper dates, entry deadlines and late‑fee dates, spec changes; JCQ, AQA, Pearson Edexc... |
| POST | `/api/mcp/uk-exams` | Remote MCP server — tools exam_topic_paper, exam_spec_lookup, exam_paper_index. |
| POST | `/api/mcp/uk-gov-process` | Remote MCP server — tool uk_gov_process {service}: UK government service fees, steps, processing times and dated changes, verified against gov.uk. |
| POST | `/api/mcp/uk-rates` | Remote MCP server — tool uk_rates_lookup. |
| POST | `/api/mcp/uk-vehicle-rules` | Remote MCP server — tool uk_vehicle_rules_lookup. |
| POST | `/api/mcp/us-rates` | Remote MCP server — tool us_rates_lookup (US federal rates and thresholds, tax year 2026; committed data read from the IRS and SSA documents). |
| POST | `/api/mcp/vehicles` | Remote MCP server — uk_mot_reliability, uk_mot_vehicle_search (live via whatbreaks.uk), uk_recalls_for_model, uk_recalls_search (DVSA), fr_recalls_for_model,... |
| GET | `/api/policy-rates` | Central-bank policy rates, verified 2026-10-03 against the banks' own pages: Bank of England Bank Rate, US Federal Reserve federal funds target range (lower/... |
| GET | `/api/provenance/domain` | Who runs this domain? Live RDAP: age, registrar, nameservers, typosquat resemblance. Descriptive signals, not a verdict. |
| GET | `/api/provenance/package` | Who publishes this package, and is it a typosquat? Live npm/PyPI metadata. |
| GET | `/api/software-eol/status` | Is this version still supported, and until when? nodejs, python, ubuntu, debian, android, ios, macos, windows, oracle-jdk, go, ruby, php, postgresql, react —... |
| GET | `/api/software-eol/timeline` | Every release cycle of a product, newest first, with release date, supported true\|false, eol, LTS, latest release and support-end dates; same snapshot as /st... |
| POST | `/api/stats` | Exact statistics & probability — for the maths agents get wrong in their head. |
| GET | `/api/tax/take-home` | Take-home pay after income tax and social contributions for uk, us, ca, au, in, br, pl, fr, de, es: gross, net and total deductions (annual + monthly), typed... |
| GET | `/api/uk/exam-dates` | UK exam dates verified 2026-10-04 against JCQ and the boards' own documents: results days, the summer 2027 exam timetable (JCQ window and the dates of GCSE M... |
| GET | `/api/uk/exams/papers` | Past-paper index: official assessment-resources links per spec (links only — papers are board copyright). |
| GET | `/api/uk/exams/specs` | Spec metadata: codes, paper structure, durations, tiers, official links. |
| GET | `/api/uk/exams/topic` | Which paper is a topic on? Built for queries like "is electricity paper 2 AQA". |
| GET | `/api/uk/gov-process` | UK government service facts verified 2026-10-04 against gov.uk: fees, processing times as stated, eligibility and required documents (each with the quoted se... |
| GET | `/api/uk/rates` | UK tax-year rates & thresholds (2026-27), verified against gov.uk. |
| GET | `/api/uk/vehicle-rules` | UK vehicle tax (VED) and MOT rules for 2026-27, verified 2026-10-04 against gov.uk: first-year VED by CO2 band (cars registered on or after 1 April 2017), th... |
| GET | `/api/us/rates` | US federal rates and thresholds for tax year 2026, verified 2026-10-03 against the IRS revenue procedures and notices and SSA's Federal Register notice: inco... |
| GET | `/api/vehicles/eu/safety-gate` | STUB — EU Safety Gate vehicle alerts are being added; returns covered:false with the official URL for now. |
| GET | `/api/vehicles/fr/recalls` | Official French vehicle recalls (RappelConso / DGCCRF open data, 1663 automobile fiches 2018-01-19 → 2026-08-07) for a brand (+ model): fiche number, date, r... |
| GET | `/api/vehicles/fr/search` | Keyword search across all RappelConso automobile fiches (French text), newest first, optional since date. |
| GET | `/api/vehicles/jp/complaints` | MLIT owner defect reports (39954 across 313 models): total per model + breakdown by defective device. |
| GET | `/api/vehicles/jp/recalls` | Official Japanese recall filings (国土交通省 MLIT; 3283 filings across 313 models sold in Japan, incl. Lexus and imports): notification number, date, device, affe... |
| GET | `/api/vehicles/uk/mot` | Real UK MOT failure data for one model generation: per-category failure rates (overall and at your mileage), riskiest components. |
| GET | `/api/vehicles/uk/recalls` | Official UK vehicle safety recalls (DVSA open data, OGL v3.0; 4876 recalls launched 2016-01-01 → 2027-02-03) for a make (+ model). |
| GET | `/api/vehicles/uk/recalls-search` | Keyword search across all served DVSA recalls (English text: make, model, concern, defect, remedy), newest first, optional since date. |
| GET | `/api/vehicles/uk/search` | Search the 530 UK model generations covered by the MOT dataset (live proxy to whatbreaks.uk). |
| GET | `/changes` | The changelog as a page: every verified change to UK tax/NI thresholds, exam specs, official vehicle datasets, software end-of-life dates, central-bank polic... |
| GET | `/changes.atom` | Atom feed of the changelog (?area= optional); same entries as /changes.rss. |
| GET | `/changes.rss` | RSS 2.0 feed of the changelog (?area= optional). guid = permalink on /changes, link = official source, pubDate = verifiedDate. |
| GET | `/f/{key}` | Verified Facts (verified-facts/0.2): one official figure by key — value, unit, period, effectiveFrom, official source, quote, verifiedDate, status against ?m... |
| GET | `/openapi.json` | OpenAPI 3.1 for the facts and changes endpoints (getFact, getFacts, resolveFact, whatChangedSince) — for LangChain / LlamaIndex OpenAPI tool loaders. |
| GET | `/protocol` | The Verified Changes protocol v0.1 specification — the open convention /api/changes, /changes, the feeds and what_changed_since follow, so any site can publi... |
| GET | `/protocol/facts` | The Verified Facts protocol v0.2 specification (indexable HTML; ?format=md returns the markdown). |
| GET | `/schema/changes.v0.json` | JSON Schema (draft 2020-12) for a changes document and a single entry; /schema/well-known-changes.v0.json covers the discovery document. |

## Machine-readable artifacts (2)

- **OpenAPI** — https://artifacts.apis.io/databutler-dev/openapi/_ae-authored/databutler-dev-openapi-generated.yml
- **JSONSchema** — https://artifacts.apis.io/databutler-dev/json-schema/databutler-dev-post-api-stats-request-schema.json

## Other databutler-dev APIs (1)

- [Data Butler API](https://apis.io/apis/databutler-dev/data-butler-api/)

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/databutler-dev/databutler-dev-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/databutler-dev/.