# SignNow — API Agent Score

> Score: 62/100 (Grade: C) | Domain: signnow.com | Rubric: 1.0.0 | Checked: July 29, 2026

SignNow scored 62/100 (C), classified "partially-ready".

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

## Summary

- Overall: 62/100 (C)
- Classification: partially-ready

## Category Scores

- API Design: 74/100 (B)
- Developer Experience: 66/100 (C)
- Agent Discovery: 65/100 (C)
- Agent Understanding: 64/100 (C)
- Agent Usability: 47/100 (F)

## Check Results

### API Design

- [warn] Schema coverage & depth — 0/16 (0%) enum-like params are realized as constrained types (not bare strings). Investigated: sdk 78%, spec 52%.
- [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 — No parameters or responses available to score example coverage. Investigated: spec 100%, sdk 100%, docs 0%.
- [warn] Auth declared & discoverable — No securitySchemes declared. Investigated: docs 20%, spec 10%.

### Developer Experience

- [pass] Self-service developer portal — Self-service signup at https://docs.signnow.com/docs/signnow/get-started; no free tier or sandbox language detected. Investigated: docs 100%.
- [pass] Description completeness — 34% description completeness. Investigated: spec 100%, sdk 32%.
- [pass] Changelog published — Newest official SDK activity 7 day(s) ago. Investigated: sdk 100%, spec 50%, docs 50%.
- [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 1 sampled docs pages. Investigated: docs 0%.

### Agent Discovery

- [pass] Registry & SDK presence — Indexed on Context7 (websites/signnow_signnow, 2469 snippets). Investigated: docs 100%, sdk 67%, mcp 50%, cli 0%, wellknown 0%.
- [warn] Docs reachable, not hard auth-gated — Server ignores Accept: text/markdown header (0/1 pages return markdown). Investigated: docs 75%.
- [warn] Crawlable / AEO — No sitemap discoverable via robots.txt or /sitemap.xml on the docs host. Investigated: wellknown 50%.
- [fail] llms.txt present, valid & comprehensive — No llms.txt found at any candidate location (https://docs.signnow.com/docs/signnow/welcome/llms.txt, https://docs.signnow.com/llms.txt, https://docs.signnow.com/docs/llms.txt). Investigated: docs 0%, sdk 0%.

### Agent Understanding

- [warn] Operation purpose clarity — 0% of operations are agent-inferable. Investigated: spec 90%.
- [warn] Agent-navigable, token-efficient docs — 1 of 1 pages appear to be client-side rendered SPA shells (root detected); agents using HTTP fetches will see no content. Investigated: docs 64%.
- [warn] Machine-readable errors (RFC 9457) — Single base error "SignNowException" present, but only 1 subclass found; a richer hierarchy lets consumers catch narrowly. Investigated: sdk 50%, docs 5%, spec 3%.
- [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 1 assessed pages (1 JS-rendered). Investigated: docs 0%.
- [skip] Description consistency across surfaces — Only 1 surface description(s) with ≥6 tokens available; need at least 2 to compare.

### Agent Usability

- [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] Idempotency documented — 0% of mutating operations document idempotency. Investigated: spec 0%, docs 0%, sdk 0%.
- [fail] Rate-limit signaling — No rate-limit response headers documented. Investigated: spec 0%, docs 0%.
- [fail] Pagination documented & consistent — 2 list endpoint(s) exist but no pagination params found. Investigated: spec 0%, docs 0%.

## Executive Summary

Signnow's API program demonstrates solid foundations in API design and core reachability, but partners and their AI agents face two critical gaps that will stall the program's growth. First, there is no reliable way for agents or partners to discover, parse, or navigate the API surface without manual intervention — no llms.txt, no agent instruction file, and no structured metadata exist to guide automated consumers. Second, and most urgently, the API's operational reliability signals are entirely absent: idempotency, rate-limit behavior, and pagination are undocumented, meaning any partner or agent attempting a real workflow will hit unpredictable failures with no recovery path. Prioritize closing the operational reliability gaps immediately, then build out the agent-facing discovery and onboarding layers to unlock self-serve partner activation.