# Craft Quantities

**Canonical:** https://apis.io/providers/craftquantities-com/  
**Website:** https://craftquantities.com/  
**APIs profiled:** 1

Craft Quantities (craftquantities.com) publishes 1,165 construction calculators that show the formula and cited standard (ACI, IRC, NEC, IPC, ASHRAE, Eurocode, AS/NZS, BS) behind every number, along with trade guides, reference tables, job takeoffs and a workspace that exports a priced bill of materials. Its calculator data is offered as free static JSON under CC BY 4.0 with no key, quota or rate limit, and the same calculators are computed on request through an executable API at api.craftquantities.com/v1 and an MCP server for AI assistants.

## Kin Score — 51.0 / 100 (developing)

Scored 2026-11-13 under rubric 0.28.0.

| Facet | Score |
|---|---|
| Discoverability | 75.0 |
| Contract Quality | 49.4 |
| Contract Governance | 35.6 |
| Operational Transparency | 59.5 |
| Developer Ergonomics | 37.5 |
| Access Clarity | 48.9 |

Regulatory layer — **Government & Public Sector**: 30.4 (matched via tags).

## Agent readiness — 41.9 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | derived |
| OpenAPI Examples | verified |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | yes |
| Consent Identity | no |
| Agent Card | conformant |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |
| Pagination Ratio | paginated |
| Operation Distinctiveness | distinct |
| MCP Tool Quality | na |

## Access

Free — onboarding: unknown, pricing: free, trial: no (confidence: high).

## APIs (15)

- **Craft Quantities Static Data API** — Free static JSON files (CC BY 4.0, no key) describing every calculator input, bound, unit and test vector, plus takeoffs, standards, glossary and corrections ledger.
- **Craft Quantities Agent tools API** — Many calculations in one request, a project changed through its state token, a list grouped by MasterFormat division, and permanent ids.
- **Craft Quantities Benchmark API** — The Construction Quantities Benchmark: the calculators' test vectors as questions in both unit systems, with their answers, CC BY 4.0.
- **Craft Quantities Calculators API** — One calculator: what it asks, its answer in both systems, its sources and a link to its page.
- **Craft Quantities Cutting API** — Corner trim on the reader's saw, a room's trim plan, the scribe template and the other full-size templates, a panel or worktop fitted to walls that are not square, and the mitre...
- **Craft Quantities Diagnoses and documents API** — Faults by symptom, the documents each market uses, and trade words across markets.
- **Craft Quantities Discovery API** — Find a calculator, takeoff or worked example by what the job is.
- **Craft Quantities House and canvas API** — The House Estimator and the Construction Canvas: a drawn house and everything it is built from, a sketch measured from its points, a drawing as DXF and SVG, and a reinforcement ...
- **Craft Quantities Planner API** — The room-by-room planner: one space, or several and a roof.
- **Craft Quantities Project files API** — A My Project file the reader restores on the site. Nothing is stored.
- **Craft Quantities Quotes API** — A contractor's quote read against the job; the reader's own quote turned into a project.
- **Craft Quantities Solve backwards API** — What the material the reader already has will cover, as the site's Solve Backwards pages work it.
- **Craft Quantities Takeoffs API** — A whole job worked row by row, as its takeoff page works it.
- **Craft Quantities Units API** — Conversions by the exact factors the calculators use.
- **Craft Quantities Worked examples API** — The site's published examples, re-run now against their pinned figures.

## MCP servers (1)

- **Craft Quantities MCP server** — Remote MCP server at api.craftquantities.com; 56 tools listed.

## Agentic access (1)

- **Craft Quantities Agentic Access** — 56 operations · 33 acting · 1 human-in-the-loop

## Security (3)

- **Craft Quantities Authentication** — 1 scheme
- **Craft Quantities Domain Security** — TLSv1.3 · HSTS
- **Craft Quantities Vulnerability Disclosure** — security.txt · contact published

## Plans (1)

- **Craft Quantities Plans Pricing**

## Tags

Company, Construction, Calculators, Estimating, Building Materials, Open Data, MCP

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/craftquantities-com/). Scores are computed from the provider's own public artifacts under a published rubric.