# Sinch — API Agent Score

> Score: 71/100 (Grade: B) | Domain: sinch.com | Rubric: 1.0.0 | Checked: July 24, 2026

Sinch scored 71/100 (B), classified "partially-ready".

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

## Summary

- Overall: 71/100 (B)
- Classification: partially-ready

## Category Scores

- API Design: 68/100 (C)
- Developer Experience: 75/100 (B)
- Agent Discovery: 82/100 (A)
- Agent Understanding: 73/100 (B)
- Agent Usability: 60/100 (C)

## Check Results

### API Design

- [warn] Schema coverage & depth — 86 of 612 public signatures use loose types (anyTypeRatio=0.141). Investigated: sdk 81%.
- [pass] Example coverage — Code samples in 7 language(s) across docs (top: python, javascript, shell); 2/20 pages have ≥ 2 languages on the same page. Investigated: docs 100%, sdk 100%.
- [fail] Security & governance hygiene — No security.txt at /.well-known/security.txt or /security.txt. Investigated: wellknown 0%.
- [skip] Machine-readable, versioned contract — No surface produced evidence for this capability in this run.
- [skip] Auth declared & discoverable — No surface produced evidence for this capability in this run.

### Developer Experience

- [pass] Self-service developer portal — Signup page at https://dashboard.sinch.com/?iss=https%3A%2F%2Fid.sinch.com%2F; no free-tier language detected in docs/pricing. Investigated: docs 100%.
- [pass] Code samples in docs — Code samples in 7 language(s) across docs (top: python, javascript, shell); 2/20 pages have ≥ 2 languages on the same page. Investigated: docs 100%.
- [pass] Changelog published — Newest official SDK activity 0 day(s) ago. Investigated: sdk 100%.
- [warn] Description completeness — 42/131 operations lack a description. Investigated: sdk 68%.
- [fail] Quickstart present — No quickstart/getting-started page found at the conventional paths. Investigated: docs 0%.

### Agent Discovery

- [pass] Registry & SDK presence — Indexed on Context7 (websites/developers_sinch, 10361 snippets). Investigated: docs 100%, sdk 67%, cli 0%.
- [warn] Docs reachable, not hard auth-gated — Server ignores Accept: text/markdown header (0/50 sampled pages return markdown). Investigated: docs 75%.
- [warn] llms.txt present, valid & comprehensive — llms.txt covers 386/1339 sitemap doc pages (29%); 953 missing. Investigated: docs 63%, sdk 0%.
- [warn] Crawlable / AEO — Sitemap present (1341 entries) but carries no lastmod values. Investigated: wellknown 75%.

### Agent Understanding

- [pass] Machine-readable errors (RFC 9457) — Single base error "SinchException" with 11 subclasses. Investigated: sdk 100%.
- [warn] Agent-navigable, token-efficient docs — 21 of 50 pages have substantive content differences between markdown and HTML (avg 20% missing). Investigated: docs 80%.
- [fail] Agent instructions file (AGENTS.md) — No AGENTS.md at the site root or /.well-known/. Investigated: wellknown 0%.
- [fail] Docs structured data — Neither JSON-LD nor OpenGraph/meta tags detected across 20 sampled pages — likely a CSR-only docs site. Investigated: docs 0%.
- [skip] Operation purpose clarity — No surface produced evidence for this capability in this run.
- [skip] Description consistency across surfaces — Only 1 surface description(s) with ≥6 tokens available; need at least 2 to compare.

### Agent Usability

- [pass] Idempotency documented — Built-in retry machinery is present (grep-derived). Investigated: sdk 100%.
- [warn] Sandbox separation — No test-mode flag or sandbox environment is exposed. Investigated: sdk 50%.
- [fail] Pagination documented & consistent — None of the 11 measured list method(s) return an auto-paginating iterable. Investigated: sdk 0%.
- [fail] Runnable collection with test scripts — No public Postman workspace discovered for the org. Investigated: platform 0%.
- [skip] Rate-limit signaling — No surface produced evidence for this capability in this run.

## Executive Summary

Sinch's API program demonstrates strong discoverability fundamentals, but two areas are holding back partner and agent success: API design gaps around security governance make it harder for enterprise partners to confidently adopt and audit integrations, while agent-readiness gaps — missing structured instructions, unstructured docs, and a lack of runnable, testable collections — mean AI agents and developer tools struggle to parse, validate, and act on the API surface without manual intervention. Prioritize closing the agent-readiness gaps first to unlock autonomous integration workflows, then harden security hygiene to satisfy enterprise partner requirements.