# SerpApi — API Agent Score

> Score: 64/100 (Grade: C) | Domain: serpapi.com | Rubric: 1.0.0 | Checked: July 24, 2026

SerpApi scored 64/100 (C), classified "partially-ready".

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

## Summary

- Overall: 64/100 (C)
- Classification: partially-ready

## Category Scores

- API Design: 79/100 (B)
- Developer Experience: 48/100 (F)
- Agent Discovery: 79/100 (B)
- Agent Understanding: 49/100 (F)
- Agent Usability: 68/100 (C)

## Check Results

### API Design

- [pass] Security & governance hygiene — security.txt valid at https://serpapi.com/.well-known/security.txt (Contact + unexpired Expires). Investigated: wellknown 100%.
- [warn] Schema coverage & depth — 0/16 (0%) public params are fully typed (no any/**kwargs). Analyzer reports not all methods have a derivable input schema. Investigated: sdk 50%.
- [pass] Example coverage — README is present and includes a runnable quickstart. Investigated: sdk 100%, docs 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

- [warn] Description completeness — 9/10 operations carry a description. Investigated: sdk 90%.
- [pass] Changelog published — Newest official SDK activity 2 day(s) ago. Investigated: sdk 100%.
- [fail] Self-service developer portal — No signup page detected across conventional paths (/signup, /sign-up, /register, /get-started, /console/signup, /dashboard/signup, /try, /try-free, /free, /free-trial, /start, /start-free). Investigated: docs 0%.
- [fail] Quickstart present — No quickstart/getting-started page found at the conventional paths. Investigated: docs 0%.
- [fail] Code samples in docs — No detectable code samples across 20 sampled docs pages. Investigated: docs 0%.

### Agent Discovery

- [pass] Registry & SDK presence — Indexed on Context7 (websites/serpapi, 77130 snippets). Investigated: docs 100%, cli 100%, mcp 100%, sdk 67%, wellknown 0%.
- [warn] Docs reachable, not hard auth-gated — Server ignores Accept: text/markdown header (0/1 pages return markdown). Investigated: docs 75%.
- [warn] llms.txt present, valid & comprehensive — No llms.txt directive found in HTML of any of 1 pages. Investigated: docs 60%, sdk 0%.
- [warn] Crawlable / AEO — No sitemap discoverable via robots.txt or /sitemap.xml on the docs host. Investigated: wellknown 50%.

### Agent Understanding

- [warn] Agent-navigable, token-efficient docs — 1 of 1 pages have substantive content differences between markdown and HTML (avg 88% missing). Investigated: docs 70%.
- [warn] Docs structured data — OpenGraph/meta tags only across 18 assessed pages — no JSON-LD for answer engines to cite. Investigated: docs 50%.
- [warn] Description consistency across surfaces — Mean pairwise description similarity across 2 surfaces (docs, sdk) is 8% (threshold 35% for full credit).
- [fail] Machine-readable errors (RFC 9457) — No single common SDK base error class was found; errors do not share one root. Investigated: sdk 0%.
- [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.

### Agent Usability

- [pass] Pagination documented & consistent — An SDK-wide auto-paginator is present. (grep-derived). Investigated: sdk 100%.
- [pass] Sandbox separation — Sandbox environments are exposed (sandbox). Investigated: sdk 100%.
- [warn] Runnable collection with test scripts — No test scripts found in the workspace's collections. Investigated: platform 50%.
- [fail] Idempotency documented — No built-in retry machinery was found; transient failures are not retried. Investigated: sdk 0%.
- [skip] Rate-limit signaling — No surface produced evidence for this capability in this run.

## Executive Summary

SerpAPI's API design and discoverability foundations are solid, but the partner program has two critical gaps that will stall adoption: partners cannot self-serve their way to a first successful call, and neither partners nor their AI agents can interpret errors or understand how to use the API without manual guidance. Fixing onboarding and agent-readability must come first — everything else compounds on top of those two capabilities.