What we tested
Probed live on 26 Sep 2026 against rubric v1.2. 2 of 5 checks passed. 2 unknown.
PROBE-VERIFIEDtier 2 of 3
What its MCP server offers
We connected, ran tools/list, and recorded what came back on 26 Sep 2026. 21 tools.
create_accountget_pricingcheck_balanceget_referral_linkbuy_creditssend_envelopeupdate_draftadd_document_to_draftsend_draftcreate_templatelist_templatessend_from_templatelist_envelopesget_envelope_statusget_signing_linksremind_envelopecorrect_recipient_emailvoid_envelopedownload_signed_documentdownload_certificateget_audit_trail
What an agent could do here
Read from the page’s own content, with the wording each was drawn from. Inference is kept separate from tested facts — an agent completing the action is tier 3.
UNVERIFIED
buy“”https://zsign.io/mcp/open
register“”https://zsign.io/mcp/open
Context
18 sites in the index share the category e-signatures. 3 transactional sites share it.
How we grade
Three tiers. Every listing shows which one it has reached, and when. The rubric.
tier 1Declared
The site says agents are welcome in its robots.txt. A permission, not a capability.
tier 2Probe-verified
We fetched the site and tested each signal ourselves. Dated, repeatable, re-checked on a schedule.
tier 3Behaviourally verified
An agent completed the action end to end — booked, bought, submitted — and it worked.
Own this site?
1 check did not pass when we last looked: API catalog. Each is a small, specific fix; the rubric says exactly what we look for.
Behavioural verification — an agent completing your booking, purchase or contact flow end to end, with the date published here — opens to a small founding cohort first. Leave an email to be in it.
Related verified sites
Sendforsign documentationContract infrastructure platform for modern SaaS and platforms enabling contract management, e-signature workflows, document editing embedding, template management, and automated contract creation and sending.
e-signatures Sign.Plus APIAPI documentation for Sign.Plus, enabling integration of secure, legally-binding electronic signature workflows, document signing, envelope and template management, recipient verification, and webhook configuration.
e-signatures BoldSignSecure electronic signature platform offering document sending, signing, tracking, and workflow automation with APIs, web and mobile apps, serving businesses and developers primarily in the US and Canada.
e-signatures AnnatureAnnature provides digital signature workflows, eSigning integration, document signing management, and identity verification with AML/CTF screening via API documentation and developer tools.
e-signatures ClearPolicyPlatform for organizations to send, track, and audit policy acknowledgments and electronic signatures without requiring recipient accounts, using links and clicks.
e-signatures iinked SignAPI documentation for iinked Sign platform, providing guides and references for developers integrating electronic signature workflows, signing packages, signers management, embedding signing experiences, and webhook setup.
e-signatures Spryngtime API docsAPI documentation for Spryngtime's e-signing tool, including integration guides, API references, and webhook event info, accessible online.
e-signatures Inkless API docsAPI documentation for Inkless e-signature workflows, including sending documents for signing, creating reusable signature templates, managing signing status, and integrating real-time signing events via webhooks.
e-signatures Record generated from a live database query. Method: about the index.
How we found this site: probe discovery. This site didn’t declare agent access — we found it by checking the open web. Everything above was tested the same way, against the same rubric, on the date shown. How we choose what to check, and how to opt out →