E-Signature
Variants seen in the corpus:
E-SignaturesElectronic SignatureElectronic SignaturesElectronic SigningDocument SigningeSignE-Signature
Providers using this tag (84)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Exemplar 3 Complete, well-documented, and agent-ready
Strong 8 Solid coverage with minor gaps
Developing 25 Usable, with meaningful gaps to close
Thin 23 Limited public surface area
Emerging 17 Early or largely undocumented
Minimal 7 Almost no public developer surface
Unrated 1 Not yet scored
APIs with this tag (30)
Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →
Exemplar 3 Complete, well-documented, and agent-ready
Strong 4 Solid coverage with minor gaps
imgauth Remote MCP ServerHosted, zero-install MCP server (Streamable HTTP, protocol 2025-06-18) exposing the attestation service to ...Fenergo E Signature APIThe ESignature API from Fenergo — 4 operation(s) for esignature.Zoho SignThe Zoho Sign API helps developers integrate document signing capabilities within applications, enabling us...Procore Electronic Signatures APIThe Electronic Signatures API from Procore — 3 operation(s) for electronic signatures.
Developing 8 Usable, with meaningful gaps to close
Adobe Acrobat Sign APIThe Adobe Acrobat Sign API enables sending, tracking, and managing electronic signature agreements programm...Acrobat Sign APIA REST API for creating and managing electronic signature workflows programmatically. The API supports docu...Factorial Documents APIManage company- and employee-scoped documents and folders. Create, update, retrieve, and delete documents, ...Lone Wolf Authentisign APIE-signature API for Authentisign, Lone Wolf's signing product. Creates and manages signings, signer roles, ...Zinnia Esignature APIE-signature for DocuSign: load recipients, submit the case, poll signer status, cancel ceremony (void envel...Docupilot e Sign APIThe e Sign API from Docupilot — 29 operation(s) for e sign.Keynua APIREST API for creating contracts, sending them to signers over WhatsApp/SMS/email, running biometric identit...dotloop Transaction Management APIRESTful JSON CRUD API for real-estate transaction management - loops, loop details, folders, documents, par...
Thin 8 Limited public surface area
Anvil Etch E-Sign APIEmbed white-labeled e-signature collection into applications. Create e-sign packets, route documents to mul...Anvil GraphQL APIThe primary query and mutation interface for Anvil. Covers e-sign packets, workflows, PDF operations, webfo...Anvil WebhooksEvent-driven notifications for Anvil workflow events. Receive HTTP POST callbacks when e-sign packets are c...Sadq e Sign APIElectronic and digital signature operations via Nafath/PKIQualia Documents APISend and receive closing documents attached to an order - upload, retrieve, and share files across the part...Papersign APIREST API for managing Papersign electronic signature documents, folders, spaces, and webhooks. Requires a s...Incode Electronic signature APIThe Electronic signature API from Incode — 4 operation(s) for electronic signature.Xfers E Signature APIAPI for e-signature
Emerging 6 Early or largely undocumented
Eversign APIRESTful JSON API for creating and sending documents for electronic signature, managing templates, uploading...signNow APIREST API for signNow, airSlate's electronic signature product. Covers documents, signatures, templates, use...Formstack Sign APIElectronic signature API for sending documents for signature, tracking status, and retrieving signed copies...Updox Forms APISend electronic intake and consent forms to patients and receive completed submissions, with Forms webhooks...Setu Aadhaar eSignAadhaar-based electronic signature API for collecting legally valid signatures on documents, with audit tra...LendingPad Documents & Conditions API (modeled)Modeled document and condition exchange surface - push borrower and loan documents into the LendingPad LOS ...
Minimal 1 Almost no public developer surface
Companies reaching this through an API (15)
These companies publish an API, specification or operation carrying “E-Signature” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.
Adobe Creative Cloud
Adobe Creative Suite
Adobe Suite
Factorial
Fenergo
Incode
LendingPad
Odessa Technologies
Progress Software
Qualia
Updox
Xfers
Zillow Group
Zinnia
Zoho
Score breakdown
Frequency
56.2
log-scaled weighted occurrences
Breadth
1.9
spread across providers
Quality lift
37.7
mean composite of providers using it
Cohesion
16.4
strength of nearest seed neighbor
Where this tag sits
Related tags
Document Management 22 co-occurrences
Contract Management 14 co-occurrences
Templates 36 co-occurrences
PDF 16 co-occurrences
Document Automation 13 co-occurrences
Document Generation 10 co-occurrences
Contract Lifecycle Management 10 co-occurrences
Documents 43 co-occurrences
Where this tag comes from
Api tag31
Provider tag89
Openapi tag4
Openapi op tag13
Markets provisional
Kin Score markets whose measured providers carry this tag. Share is the fraction of the market's measured providers that carry it — it describes the market, not this tag.
| Market | Share of the market's providers |
|---|---|
| EU eIDAS Trust Services (qualified trust service providers) | 75% |
| Legal and E-Signature | 68% |
| PDF and Document Standards (PDF tooling, document signing trust, invoice documents) | 27% |
Cohort brief
Auto-generatedThe 81 providers in the APIs.io catalog tagged E-Signature, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.
Providers
81
of 84 in the catalog
Mean Kin Score
36.8
+14.6 vs catalog 22.2
Mean Agent Readiness
25.6
+13.6 vs catalog 12
Spread
5.6–76.2
median 37.2 · σ 16.6
How the 81 split by band
Exemplar 3Strong 8Developing 25Thin 23Emerging 17Minimal 5
Facet averages, against the whole catalog
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Contract Quality | 39.6 | 17.2 | +22.4 | 81 |
| Access Clarity | 37 | 23.9 | +13.1 | 81 |
| Developer Ergonomics | 36.1 | 23.2 | +12.9 | 81 |
| Operational Transparency | 25 | 13 | +12 | 81 |
| Discoverability | 65.2 | 57.9 | +7.3 | 81 |
| Contract Governance | 9.9 | 6.5 | +3.4 | 81 |
A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.
What this cohort publishes
| Artifact | This cohort | Catalog | Difference |
|---|---|---|---|
| MCP server (any) | 27% | 13% | +14 |
| MCP server (first-party) | 27% | 12% | +15 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 27% | 11% | +16 |
| Security | 99% | 98% | +1 |
| Arazzo workflows | 4% | 2% | +2 |
| Governance rules | 28% | 16% | +12 |
mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.
Top by Kin Score
- 1 Adobe 76.2
- 2 Conga 68.6
- 3 SignSealShip Partner API 66.6
- 4 imgauth — API di attestazione opere digitali 66.3
- 5 JuriSign 65.3
- 6 GetAccept 63.9
- 7 Firma.dev 63.3
- 8 Dropbox Sign (HelloSign) 60.5
- 9 GoNitro 56.9
- 10 Nitro Software 56
Top by Agent Readiness
- 1 Adobe 65.9
- 2 Anvil 57.9
- 3 Common Paper 51.1
- 4 Sadq 49.3
- 5 Conga 48.7
- 6 FormAssembly 47.9
- 7 Lone Wolf Technologies 47.7
- 8 DocSend 47.1
- 9 Dropbox Sign (HelloSign) 46
- 10 Hubflo 45.6
All 84 members of this roster resolve to a provider in the
catalog; 81 carry a score (96%).
The figures above describe the scored members only.
Coverage caveat. 66 of 81 scored members had under half their catalog-attributable points satisfied at all (catalog_earned / catalog_max < 0.5). They are INCLUDED in the mean above. A large share here means the cohort mean is partly a measurement of how far our enrichment reached, not only of how these providers publish.Generated from the catalog build of 24 October 2026, across 31984 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.
Coverage caveat. 66 of 81 scored members had under half their catalog-attributable points satisfied at all (catalog_earned / catalog_max < 0.5). They are INCLUDED in the mean above. A large share here means the cohort mean is partly a measurement of how far our enrichment reached, not only of how these providers publish.Generated from the catalog build of 24 October 2026, across 31984 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.
Work with this as data
Every tag here is available over the APIs.io API and to AI agents over MCP.