E-Signature
Variants seen in the corpus:
E-SignaturesElectronic SignatureElectronic SignaturesElectronic SigningDocument SigningeSignE-Signature
Providers using this tag (128)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Exemplar 10 Complete, well-documented, and agent-ready
Strong 20 Solid coverage with minor gaps
Developing 30 Usable, with meaningful gaps to close
Thin 33 Limited public surface area
Zoho SignSignWellBoldSignAnvilFreeSignAdobe Acrobat SignDocumensoPDFfillerCitrix ShareFileeID EasySignaturit Group, a Namirial CompanyOneflowGoodflageSignatures.comCuevrScriveConcordCertinalInfoTrackDocSpringDocracyCacheflowZoho WriterJuroFeatheryPaperformDocuGripRevvCustododotloop99 Data RoomsContractbookiFillPDF
Emerging 26 Early or largely undocumented
Minimal 8 Almost no public developer surface
Unrated 1 Not yet scored
APIs with this tag (36)
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 6 Complete, well-documented, and agent-ready
ShareFile API v3The ShareFile API v3 is the OData-based REST interface of Progress ShareFile, covering Items, Folders, Acco...Adobe Sign APIIntegrate e-signature workflows and document signing.Adobe Acrobat Sign APIEmbed e-signature workflows and manage signing agreements programmatically.Jotform MCP ServerOfficial remote Model Context Protocol server (Streamable HTTP, OAuth 2.0 authorization code with PKCE S256...imgauth Remote MCP ServerHosted, zero-install MCP server (Streamable HTTP, protocol 2025-06-18) exposing the attestation service to ...Procore Electronic Signatures APIThe Electronic Signatures API from Procore — 3 operation(s) for electronic signatures.
Strong 5 Solid coverage with minor gaps
Fenergo E Signature APIThe ESignature API from Fenergo — 4 operation(s) for esignature.Evrotrust E Signatures APIThe e-Signatures API from Evrotrust — 6 operation(s) for e-signatures.Zoho SignThe Zoho Sign API helps developers integrate document signing capabilities within applications, enabling us...AIMEAT Document signing APIAIMEAT signing requests sealed by the node, and validation of PDF/CMS signatures made elsewhere against the...Toku Electronic Signature APICreación de Documents para firma electrónica, consulta de su estado y descarga del documento firmado.
Developing 11 Usable, with meaningful gaps to close
Factorial Documents APIManage company- and employee-scoped documents and folders. Create, update, retrieve, and delete documents, ...Acrobat Sign APIA REST API for creating and managing electronic signature workflows programmatically. The API supports docu...Gridlines E Sign APIThe E-Sign API from Gridlines — 4 operation(s) for e-sign.Lone Wolf Authentisign APIE-signature API for Authentisign, Lone Wolf's signing product. Creates and manages signings, signer roles, ...Adobe Acrobat Sign APIThe Adobe Acrobat Sign API enables sending, tracking, and managing electronic signature agreements programm...Keynua APIREST API for creating contracts, sending them to signers over WhatsApp/SMS/email, running biometric identit...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.DocsAutomator APIREST API for programmatic document generation, automation management, and e‑signature workflows.dotloop Transaction Management APIRESTful JSON CRUD API for real-estate transaction management - loops, loop details, folders, documents, par...Sadq e Sign APIElectronic and digital signature operations via Nafath/PKI
Thin 7 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...Qualia Documents APISend and receive closing documents attached to an order - upload, retrieve, and share files across the part...Incode Electronic signature APIThe Electronic signature API from Incode — 4 operation(s) for electronic signature.Papersign APIREST API for managing Papersign electronic signature documents, folders, spaces, and webhooks. Requires a s...Xfers E Signature APIAPI for e-signature
Emerging 5 Early or largely undocumented
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...Eversign APIRESTful JSON API for creating and sending documents for electronic signature, managing templates, uploading...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...
Minimal 2 Almost no public developer surface
Companies reaching this through an API (19)
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
AIMEAT
Factorial
Fenergo
Gridlines
Incode
LendingPad
Odessa Technologies
Procore
Progress Software
Qualia
Toku
Updox
Xfers
Zillow Group
Zinnia
Zoho
Score breakdown
Frequency
56.7
log-scaled weighted occurrences
Breadth
1.6
spread across providers
Quality lift
38.6
mean composite of providers using it
Cohesion
15.9
strength of nearest seed neighbor
Where this tag sits
Related tags
Document Management 29 co-occurrences
Contract Management 17 co-occurrences
Templates 45 co-occurrences
Document Automation 17 co-occurrences
Documents 54 co-occurrences
Contract Lifecycle Management 13 co-occurrences
PDF 19 co-occurrences
Document Generation 12 co-occurrences
Where this tag comes from
Provider tag128
Api tag37
Openapi tag6
Openapi op tag21
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 111 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
111
of 128 in the catalog
Mean Kin Score
39.1
+15.0 vs catalog 24.1
Mean Agent Readiness
26.6
+12.5 vs catalog 14.1
Spread
4.8–75.5
median 38.2 · σ 17.4
How the 111 split by band
Exemplar 8Strong 18Developing 27Thin 30Emerging 23Minimal 5
Facet averages, against the whole catalog
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Contract Quality | 38.5 | 18.6 | +19.9 | 111 |
| Access Clarity | 47.2 | 30 | +17.2 | 111 |
| Developer Ergonomics | 37.5 | 24.5 | +13 | 111 |
| Operational Transparency | 25 | 13.2 | +11.8 | 111 |
| Discoverability | 65.2 | 59.1 | +6.1 | 111 |
| Contract Governance | 15.8 | 9.7 | +6.1 | 111 |
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) | 29% | 18% | +11 |
| MCP server (first-party) | 29% | 16% | +13 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 27% | 13% | +14 |
| Security | 99% | 99% | 0 |
| Arazzo workflows | 4% | 1% | +3 |
| Governance rules | 68% | 36% | +32 |
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 75.5
- 2 Conga 72.7
- 3 Docusign 71.5
- 4 Dropbox Sign (HelloSign) 71.1
- 5 Skribble 70.9
- 6 Jotform 70.2
- 7 imgauth — API di attestazione opere digitali 68.9
- 8 Signicat 68.1
- 9 JuriSign 67.9
- 10 GetAccept 67.1
Top by Agent Readiness
- 1 Adobe 64.2
- 2 Anvil 57.9
- 3 Contracko 56.8
- 4 InkSeal 55.6
- 5 APISign 53.3
- 6 Common Paper 51.1
- 7 Concord 50.5
- 8 Sadq 49.3
- 9 Dropbox Sign (HelloSign) 48.8
- 10 Conga 48.7
All 128 members of this roster resolve to a provider in the
catalog; 111 carry a score (87%).
The figures above describe the scored members only.
Coverage caveat. 74 of 111 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 14 November 2026, across 41591 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. 74 of 111 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 14 November 2026, across 41591 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.