established · 0.0 marketcapability domainresource

E-Signature

Score 24.6 / 100 58 providers +7 via APIs 15 APIs Search apis.io →
Variants seen in the corpus: E-SignatureE-signatureeSignature

Providers using this tag (58)

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Strong 9 Solid coverage with minor gaps
DocusignAgreementsContractsDigital Transaction ManagementDocuments7 APIs64.0imgauth — API di attestazione opere digitalidigital notarizationTimestampingproof-of-existencecontent authenticity1 API63.5JuriSignElectronic SignatureeIDASDocument Signing1 API63.1CongaCompanyEnterprise SoftwareContract Lifecycle ManagementCPQ31 APIs62.6GetAcceptCompanyCloudSales EnablementElectronic Signature1 API62.0GoNitroCompanyDocumentsPDF2 APIs56.9IroncladContract Lifecycle ManagementContractsLegal TechLegalOps3 APIs56.9Dropbox Sign (HelloSign)CompanyElectronic SignaturesDocuments1 API56.6Nitro SoftwareCompanyPDFDocuments1 API54.6
Developing 25 Usable, with meaningful gaps to close
YouSignElectronic SignatureeIDASDigital Signature1 API53.8AdvicePayFinancial-ServicesPaymentsBillingInvoicing1 API53.3LawmaticsLegalCRMLaw FirmsClient Intake1 API52.7DocuSealDocument SigningElectronic SignatureDocument-Management1 API52.6HR PartnerHRHRISHuman ResourcesEmployee Records1 API51.8Lone Wolf TechnologiesReal-EstateUnited StatesPropTechTransaction6 APIs51.4SpotDraftContract Lifecycle ManagementContractsLegal Tech1 API50.7PDF.coPDFDocument AutomationArtificial IntelligenceOCR1 API50.4SignWellElectronic SignatureDocumentsPDF1 API49.3QwilrCompanyProposalsDocumentsSales1 API48.9DocupilotDocument GenerationPDF GenerationDocument AutomationTemplate Engine2 APIs48.7LendKeyCompanyFintechLendingLoans4 APIs48.3Zoho SignElectronic SignaturesDocument-ManagementDigital Signatures1 API46.9BoldSignElectronic SignatureDocument-ManagementEmbedded Signing1 API46.5RentberryReal-EstatePropTechRentalsRental Marketplace2 APIs45.2DocSendCompanyEnterpriseDocument SharingSales Enablement1 API44.8HubfloClient PortalProfessional ServicesCRMInvoicing1 API44.6Common PaperCompanyContractsContract ManagementLegal Tech1 API44.4JuroContract ManagementContract Lifecycle ManagementContract LifecycleContract Automation1 API43.6SignNowDocument-ManagementElectronic SignatureWorkflow-Automation1 API43.1PandaDocDocument AutomationDocument-ManagementDocument Generation1 API42.9EversignElectronic SignaturesDocument-ManagementPDF1 API42.5FeatheryFormsForm BuilderMulti-Step FormsDocument Intelligence1 API42.3DocumensoDocumentsSigningOpen-Source1 API40.2PDFfillerPDFDocument-ManagementForm Builder1 API39.9
Thin 16 Limited public surface area
NotarizeCompanyPropTechNotarizationRemote Online Notarization1 API38.8ContractbookContract ManagementContract Lifecycle ManagementContract LifecycleLegal1 API38.7PaperformFormsPaymentsSubmissionsSurveys2 APIs37.7OneflowContract ManagementContract Lifecycle ManagementDigital Contracts1 API37.2dotloopReal-EstateTransaction ManagementLoopsDocuments1 API37.0ScriveElectronic SigningDigital IdentityeID1 API35.9Sadq Holding LimitedCompanyDigital SignatureIdentity1 API35.8Rocket LawyerLegalLegal TechnologyLegal TechLegal Documents4 APIs35.2SkySlopeReal-EstateTransaction ManagementDigital Forms2 APIs34.3SignaturelyElectronic SignatureDocument SigningE-Signature API1 API33.8Dropbox SignElectronic SignatureDocument SigningWorkflow-Automation1 API33.7airSlateDocument AutomationWorkflowsPDF1 API33.3Citrix ShareFileFile SharingDocument WorkflowSecure File Transfer1 API31.6CacheflowCompanyFintechBillingSubscription2 APIs30.2Adobe Acrobat SignElectronic SignatureDocument WorkflowDigital Signature1 API30.1FormstackFormsDocumentsWorkflow-Automation1 API26.6
Emerging 5 Early or largely undocumented
GatekeeperContract ManagementContract Lifecycle ManagementVendor ManagementProcurement1 API25.3Nutrient.ioDocumentsPDFDocument Processing4 APIs24.9SigneasyElectronic SignatureDocumentsContract Management1 API24.8ConcordContract ManagementContract Lifecycle ManagementContractsAgreements1 API24.1AnduinCompanyPrivate MarketsFund AdministrationInvestor Onboarding15.9
Minimal 2 Almost no public developer surface
Indio TechnologiesInsuranceInsurtechInsurance ApplicationsSubmissions7.9TrustWeaverCompanySoftware-as-a-ServiceE-InvoicingCompliance5.0
Unrated 1 Not yet scored
GoodlegalCompanyLegalLegal TechDocument Automation

APIs with this tag (14)

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 1 Complete, well-documented, and agent-ready
Adobe Sign APIIntegrate e-signature workflows and document signing.75.6
Strong 2 Solid coverage with minor gaps
imgauth Remote MCP ServerHosted, zero-install MCP server (Streamable HTTP, protocol 2025-06-18) exposing the attestation service to ...63.5JuriSign APIDocumented, versioned REST API (OpenAPI 3.0.3, 46 operations across 8 tags) for eIDAS SES electronic signat...63.1
Developing 4 Usable, with meaningful gaps to close
Lone Wolf Authentisign APIE-signature API for Authentisign, Lone Wolf's signing product. Creates and manages signings, signer roles, ...51.4Factorial Documents APIManage company- and employee-scoped documents and folders. Create, update, retrieve, and delete documents, ...51.3Eversign APIRESTful JSON API for creating and sending documents for electronic signature, managing templates, uploading...42.5dotloop Transaction Management APIRESTful JSON CRUD API for real-estate transaction management - loops, loop details, folders, documents, par...41.3
Thin 5 Limited public surface area
Papersign APIREST API for managing Papersign electronic signature documents, folders, spaces, and webhooks. Requires a s...37.7Dropbox Sign Events and Callbacks APIOutbound event / callback surface for Dropbox Sign. The platform POSTs JSON event payloads (wrapped in a `m...33.7signNow APIREST API for signNow, airSlate's electronic signature product. Covers documents, signatures, templates, use...33.3Xfers E-signature APIAPI for e-signature30.3Formstack Sign APIElectronic signature API for sending documents for signature, tracking status, and retrieving signed copies...26.6
Emerging 1 Early or largely undocumented
Updox Forms APISend electronic intake and consent forms to patients and receive completed submissions, with Forms webhooks...21.0
Minimal 1 Almost no public developer surface
IntegrationsPre-built integrations across credit bureaus (FICO LiquidCredit, PayNet, D&B, Experian, Equifax, TransUnion...9.5

Companies reaching this through an API (7)

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 Suite Factorial Odessa Technologies Progress Software Updox Xfers Zillow Group

Score breakdown

Frequency
51.1
log-scaled weighted occurrences
Breadth
1.6
spread across providers
Quality lift
47.6
mean composite of providers using it
Cohesion
12.8
strength of nearest seed neighbor

Related tags

Electronic Signature 14 co-occurrences Document-Management 14 co-occurrences PDF 12 co-occurrences Contract Lifecycle Management 9 co-occurrences Templates 26 co-occurrences Document Automation 9 co-occurrences Document Workflow 5 co-occurrences Sign 5 co-occurrences

Where this tag comes from

Provider tag58
Api tag15
Openapi tag1
Openapi op tag3

Cohort brief

Auto-generated

The 56 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
56
all scored
Mean Kin Score
42.7
+18.8 vs catalog 23.9
Mean Agent Readiness
28.5
+16.5 vs catalog 12
Spread
7.9–64
median 43.4 · σ 12.1
How the 56 split by band
Exemplar 0Strong 9Developing 25Thin 16Emerging 5Minimal 1
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 50.6 19.8 +30.8 56
Access Clarity 48.1 26.5 +21.6 56
Operational Transparency 32.4 14 +18.4 56
Developer Ergonomics 38.3 23.4 +14.9 56
Discoverability 69.2 61.2 +8 56
Contract Governance 10 6.4 +3.6 56

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
ArtifactThis cohortCatalogDifference
MCP server (any) 21% 10% +11
MCP server (first-party) 26% 13% +13
Agent Skills 0% 0% 0
OAuth scopes 39% 11% +28
Security 98% 97% +1
Arazzo workflows 5% 2% +3
Governance rules 28% 14% +14

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. 1 Docusign 64
  2. 2 imgauth — API di attestazione opere digitali 63.5
  3. 3 JuriSign 63.1
  4. 4 Conga 62.6
  5. 5 GetAccept 62
  6. 6 GoNitro 56.9
  7. 7 Ironclad 56.9
  8. 8 Dropbox Sign (HelloSign) 56.6
  9. 9 Nitro Software 54.6
  10. 10 YouSign 53.8
Top by Agent Readiness
  1. 1 Conga 50.5
  2. 2 Sadq Holding Limited 50.3
  3. 3 Lone Wolf Technologies 49.3
  4. 4 DocSend 47.1
  5. 5 Dropbox Sign (HelloSign) 44.8
  6. 6 Qwilr 44.6
  7. 7 Hubflo 44.4
  8. 8 Lawmatics 42.2
  9. 9 DocuSeal 37.8
  10. 10 JuriSign 36.8
All 58 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 15 September 2026, across 27661 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

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Tools for tags

7 MCP tools reach this
  • find_tagsBrowse and filter every tag in the catalog.
  • get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
  • cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
  • cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This tag 
curl "https://apis.io/api/v1/tags/e-signature"
All tags 
curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort 
curl "https://apis.io/api/v1/cohorts/tag/e-signature"
The distribution (Pro) 
curl "https://apis.io/api/v1/cohorts/tag/e-signature/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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