# Anvil — API Agent Score

> Score: 86/100 (Grade: A) | Domain: useanvil.com | Rubric: 1.0.0 | Checked: July 24, 2026

Anvil scored 86/100 (A), classified "ai-ready".

[View full report](https://www.postman.com/ai/ai-ready-apis/company/useanvil)
[All organizations](https://www.postman.com/ai/ai-ready-apis/llms.txt)

## Summary

- Overall: 86/100 (A)
- Classification: ai-ready

## Category Scores

- API Design: 94/100 (A+)
- Developer Experience: 100/100 (A+)
- Agent Discovery: 91/100 (A+)
- Agent Understanding: 79/100 (B)
- Agent Usability: 72/100 (B)

## Check Results

### API Design

- [pass] Schema coverage & depth — 25/25 (100%) public params are fully typed (no any/**kwargs). Analyzer confirms all methods have a derivable input schema. Investigated: sdk 100%, spec 75%.
- [pass] Auth declared & discoverable — Authentication required (global or on every operation). Investigated: spec 100%, docs 100%.
- [warn] Machine-readable, versioned contract — info.version="1.0.0" set but no versioning scheme (URL / header / media type) detected. Investigated: spec 75%, docs 50%.
- [pass] Security & governance hygiene — No credential-shaped strings detected in spec. Investigated: spec 100%, wellknown 0%.
- [pass] Example coverage — 100% example coverage across params + responses. Investigated: spec 100%, docs 100%, sdk 100%.

### Developer Experience

- [pass] Self-service developer portal — Signup page at https://app.useanvil.com/signup (CSR-rendered — body classifier inconclusive); free tier / sandbox documented in pricing/docs. Investigated: docs 100%.
- [pass] Quickstart present — Quickstart at https://www.useanvil.com/docs/api/getting-started/ has a runnable sample in the .md variant (https://www.useanvil.com/docs/api/getting-started.md). Investigated: docs 100%.
- [pass] Code samples in docs — Code samples present on 12/20 pages across 1 language(s); broader multi-language coverage missing. Investigated: docs 100%.
- [pass] Description completeness — 50% description completeness. Investigated: spec 100%, sdk 17%.
- [pass] Changelog published — Newest official SDK activity 119 day(s) ago. Investigated: sdk 100%, spec 0%, docs 0%.

### Agent Discovery

- [pass] Docs reachable, not hard auth-gated — All 26 pages are publicly accessible. Investigated: docs 100%.
- [pass] Registry & SDK presence — CLI documented with install instructions (download, brew). Investigated: cli 100%, sdk 75%, docs 0%, mcp 0%, wellknown 0%.
- [warn] llms.txt present, valid & comprehensive — No llms.txt directive found in HTML of any of 26 pages. Investigated: docs 75%, sdk 0%.
- [warn] Crawlable / AEO — Sitemap present (9 entries) but carries no lastmod values. Investigated: wellknown 75%.

### Agent Understanding

- [pass] Machine-readable errors (RFC 9457) — error codes documented in the docs site at https://www.useanvil.com/blog/product-news/etch-api-improved-notifications-error-handling/. Investigated: spec 100%, docs 100%, sdk 100%.
- [pass] Operation purpose clarity — 100% of operations have a clear summary + operationId an agent can select on. Investigated: spec 100%.
- [warn] Agent-navigable, token-efficient docs — 4 of 24 pages have substantive content differences between markdown and HTML (avg 10% missing). Investigated: docs 65%.
- [pass] Docs structured data — JSON-LD Article markup on 12/12 assessed pages (100%) with dateModified present. Investigated: docs 100%.
- [warn] Description consistency across surfaces — Mean pairwise description similarity across 3 surfaces (spec, docs, sdk) is 1% (threshold 35% for full credit).
- [fail] Agent instructions file (AGENTS.md) — No AGENTS.md at the site root or /.well-known/. Investigated: wellknown 0%.

### Agent Usability

- [pass] Idempotency documented — idempotency documented in the docs site at https://www.useanvil.com/blog/engineering/e-signature-audit-trail-schema-events-json-checklist/. Investigated: spec 100%, docs 100%, sdk 100%.
- [pass] Sandbox separation — Sandbox environments are exposed (sandbox). Investigated: sdk 100%, spec 0%, docs 0%.
- [warn] Runnable collection with test scripts — No test scripts found in the workspace's collections. Investigated: platform 50%.
- [fail] Rate-limit signaling — No rate-limit response headers documented. Investigated: spec 0%, docs 0%.
- [skip] Pagination documented & consistent — No surface produced evidence for this capability in this run.

## Executive Summary

Useanvil's API program shows strong fundamentals in API design and documentation discovery, giving partners a solid baseline to build against. The two areas that need the most attention are agent understanding and agent usability: agents currently lack a structured instructions file and rate-limit signaling, which means AI-powered integrations will struggle to self-serve reliably without guessing at constraints or context. Prioritizing an AGENTS.md file and proper rate-limit headers will unlock autonomous agent workflows and reduce partner support overhead fastest.