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SignatureAPI

Sends documents for e-signature through an API, tracking signers and returning a sealed final file with an audit log.

From $25/mo

DocumentsFor developers
signatureapi.com ↗
Open signatureapi.comAlternativesSet it up for my teamIs SignatureAPI yours? Claim the card →
At a glanceswept Oct 13, 2026

≈ 121visits/mo

Use not read yet · estimate, read Oct 13, 2026

  • SignatureAPI121
  • #1 Coda3.6M
For
Developers and SaaS teams adding e-signatures to their apps or workflows
Price
From $25/mopricing page, read Oct 18, 2026
Company
Signature API, Inc. · Domain since 2013privacy policy · domain registered
Runs as
APINo-code
Used for
  • Send documents from templates for electronic signature
  • Track signing activity and receive signature notifications
  • Bundle multiple documents into one signing envelope
read off signatureapi.com on Oct 18, 2026
Worth knowingcomputed from what we read · each with its source
  • Used more than 63% of the 200 tools on its shelfINITE Atlas →
  • On the web since 2013, older than 95% of its shelfINITE Atlas
  • Has an MCP server (1 in the registry)public registry →
  • Publishes llms.txt, a file written for AI assistantssignatureapi.com ↗
Pricingpricing page, read Oct 18, 2026

From $25/mo

pricing page

Your datawhat they publish, each line with its page · read Oct 18, 2026

These are SignatureAPI's own statements, read from its pages. We did not audit them. A line that is missing was not found on the pages we read; it does not mean the practice is absent.

How a program reaches itfound, not claimed · read Oct 18, 2026
  • MCP servercom.signatureapi/mcpverified in the MCP registry
  • Stateanswers, requires sign-inchecked 2026-10-18
  • Address to connectmcp.signatureapi.com/mcp
  • API docssignatureapi.com/docs/api/welcomethe vendor's page ↗
  • Status pagelinked from the homepagesignatureapi.com/status ↗

MCP server details →

This card as JSON, for your agent →

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.

Alternatives in Documentsby use, among tools still maintained

Figure and bar: visits/mo, estimate · year: online since

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beta

Three tools from the Atlas for the job you describe, each with what fits and what does not.

From people who use itnot part of the reading

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Questions this page answers
  • What is SignatureAPI?

    Sends documents for e-signature through an API, tracking signers and returning a sealed final file with an audit log. It is listed in the Atlas under Documents and made by Signature API, Inc.

  • Who is SignatureAPI for?

    Developers and SaaS teams adding e-signatures to their apps or workflows

  • How much does SignatureAPI cost?

    Paid plans start at $25/mo, per SignatureAPI's pricing page on 2026-10-18.

  • Who owns SignatureAPI?

    SignatureAPI is run by Signature API, Inc., per its privacy policy (2026-10-18).

  • Is SignatureAPI safe?

    We do not audit vendors. What SignatureAPI publishes, read 2026-10-18: SOC 2, HIPAA, GDPR, CCPA stated on its trust center.

  • How do I cancel SignatureAPI?

    In its own words (terms of service, 2026-10-18): “You can cancel your account at any time by sending a request to our support email address: [email protected] .”

  • Is SignatureAPI HIPAA compliant?

    SignatureAPI states HIPAA compliance and offers a business associate agreement (BAA) on its trust center (2026-10-18). We have not verified it.

  • What are alternatives to SignatureAPI?

    In Documents, by use: Foxit PDF Services (MCP), Portant, PostalForm, Corenexis, Extend, DocsAutomator.

How we read a tool

No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.

  • Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
  • Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
  • Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
  • The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.

How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.

How we read every tool → · By INITE Atlas Desk