# Symbl — API Agent Score

> Score: 73/100 (Grade: B) | Domain: symbl.ai | Rubric: 1.0.0 | Checked: July 29, 2026

Symbl scored 73/100 (B), classified "partially-ready".

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

## Summary

- Overall: 73/100 (B)
- Classification: partially-ready

## Category Scores

- API Design: 83/100 (A)
- Developer Experience: 77/100 (B)
- Agent Discovery: 58/100 (D)
- Agent Understanding: 78/100 (B)
- Agent Usability: 72/100 (B)

## Check Results

### API Design

- [warn] Schema coverage & depth — 12 of 248 public signatures use loose types (anyTypeRatio=0.048). Investigated: sdk 91%.
- [pass] Example coverage — README is present and includes a runnable quickstart. Investigated: sdk 100%.
- [warn] Security & governance hygiene — security.txt present but served only at the legacy /security.txt path; missing Contact; missing or expired Expires. Investigated: wellknown 50%.
- [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 — Self-service signup link published at https://symbldotai.slack.com/join/shared_invite/zt-4sic2s11-D3x496pll8UHSJ89cm78CA, but its target was not fetchable for classification (likely bot-gated). Investigated: docs 100%.
- [warn] Description completeness — 139/170 operations carry a description. Investigated: sdk 82%.
- [fail] Changelog published — Official SDKs stale: newest activity 617 days ago. Investigated: sdk 0%.
- [skip] Quickstart present — No surface produced evidence for this capability in this run.
- [skip] Code samples in docs — No surface produced evidence for this capability in this run.

### Agent Discovery

- [warn] Registry & SDK presence — 3/4 registry-metadata components present; missing: license. Investigated: sdk 92%, docs 0%, cli 0%.
- [warn] Crawlable / AEO — Sitemap lastmod coverage 100% or newest entry older than 90 days. Investigated: wellknown 50%.
- [fail] llms.txt present, valid & comprehensive — No /llms-full.txt found at the candidate origins. Investigated: docs 0%, sdk 0%.
- [skip] Docs reachable, not hard auth-gated — No surface produced evidence for this capability in this run.

### Agent Understanding

- [pass] Machine-readable errors (RFC 9457) — Single base error "StatusError" with 2 subclasses. Investigated: sdk 100%.
- [fail] Agent instructions file (AGENTS.md) — No AGENTS.md at the site root or /.well-known/. Investigated: wellknown 0%.
- [skip] Operation purpose clarity — No surface produced evidence for this capability in this run.
- [skip] Agent-navigable, token-efficient docs — No surface produced evidence for this capability in this run.
- [skip] Docs structured data — 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] 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.
- [skip] Pagination documented & consistent — No surface produced evidence for this capability in this run.

## Executive Summary

Symbl's API design and schema quality are strong — partners can build against a well-typed contract. The critical gaps are in discoverability and agent-readiness: AI agents and partner developers cannot find, parse, or run Symbl's APIs without manual intervention. Closing the machine-readable discovery gap (llms.txt, agent instructions), adding a public changelog, and shipping a runnable collection with test scripts will unlock self-serve partner onboarding and give AI coding agents the trustworthy context they need to integrate correctly.