established · 0.7 marketcapability domainresource

E-Signature

Score 26.2 / 100 64 providers +10 via APIs 21 APIs Search apis.io →
Variants seen in the corpus: E-SignaturesE-Signature

Providers using this tag (64)

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

Exemplar 3 Complete, well-documented, and agent-ready
AdobeAdobeFortune 1000Analytics4 APIs80.4DocusignElectronic SignatureDocuSignAgreementsContracts7 APIs69.8CongaCompanyEnterprise SoftwareContract Lifecycle ManagementCPQ31 APIs68.0
Strong 9 Solid coverage with minor gaps
imgauth — API di attestazione opere digitalidigital notarizationTimestampingproof-of-existenceContent Authenticity1 API65.7JuriSignElectronic SignatureeIDASDocument Signing1 API65.3GetAcceptCompanyCloudSales EnablementElectronic Signature1 API63.8Firma.devCompanyDeveloper ToolsLowCost1 API60.5Dropbox Sign (HelloSign)CompanyElectronic SignatureDocuments1 API59.6GoNitroCompanyDocumentsPDF2 APIs56.8Nitro SoftwareCompanyPDFDocuments1 API56.0LawmaticsLegalCRMLaw FirmsClient Intake1 API55.9IroncladContract Lifecycle ManagementContractsLegal TechLegalOps3 APIs55.3
Developing 26 Usable, with meaningful gaps to close
YouSignElectronic SignatureeIDASDigital Signature1 API52.8QwilrCompanyProposalsDocumentsSales1 API52.6DocuSealDocument SigningElectronic SignatureDocument Management1 API51.9PDF.coPDFDocument AutomationArtificial IntelligenceOCR1 API50.8AdvicePayFinancial ServicesPaymentsBillingInvoicing1 API50.4SpotDraftContract Lifecycle ManagementContractsLegal Tech1 API48.8DocSendCompanyEnterpriseDocument SharingSales Enablement1 API48.5FormAssemblyFormsData CollectionSalesforceEnterprise1 API48.5HR PartnerHuman ResourcesHRISEmployee RecordsLeave Management1 API48.2Lone Wolf TechnologiesReal EstateUnited StatesPropTechTransaction6 APIs47.8DocupilotDocument GenerationPDF GenerationDocument AutomationTemplate Engine2 APIs47.1SignWellElectronic SignatureDocumentsPDF1 API46.9AnvilPDFPDF FillingPDF Generation2 APIs46.8Zoho SignElectronic SignatureDocument ManagementDigital Signature1 API45.9HubfloClient PortalProfessional ServicesCRMInvoicing1 API45.1Common PaperCompanyContractsContract ManagementLegal Tech1 API45.0DocSpringPDFDocument GenerationPDF Templates1 API44.5LendKeyCompanyFintechLendingLoans4 APIs44.5BoldSignElectronic SignatureDocument ManagementEmbedded Signing1 API44.1PandaDocDocument AutomationDocument ManagementDocument Generation1 API42.7SignNowDocument ManagementElectronic SignatureWorkflow Automation1 API42.5RentberryReal EstatePropTechRentalsRental Marketplace2 APIs42.2NotarizeCompanyPropTechNotarizationRemote Online Notarization1 API40.1JuroContract ManagementContract Lifecycle ManagementContract LifecycleContract Automation1 API40.0FeatheryFormsForm BuilderMulti-Step FormsDocument Intelligence1 API39.8PDFfillerPDFDocument ManagementForm Builder1 API39.3
Thin 18 Limited public surface area
PaperformFormsPaymentsSubmissionsSurveys1 API38.1DocumensoDocumentsSigningOpen Source1 API38.0SadqCompanyDigital SignatureIdentity1 API36.3Rocket LawyerLegalLegal TechLegal DocumentsElectronic Signature4 APIs35.6dotloopReal EstateTransaction ManagementLoopsDocuments1 API35.4OneflowContract ManagementContract Lifecycle ManagementDigital Contracts1 API34.8ContractbookContract ManagementContract Lifecycle ManagementContract LifecycleLegal1 API34.6ScriveElectronic SigningDigital IdentityeID1 API34.6Dropbox SignElectronic SignatureDocument SigningWorkflow Automation1 API33.5EversignElectronic SignatureDocument ManagementPDF1 API32.8SignaturelyElectronic SignatureDocument SigningE-Signature API1 API31.4SigneasyElectronic SignatureDocumentsContract Management1 API30.9SkySlopeReal EstateTransaction ManagementDigital Forms2 APIs30.8Citrix ShareFileFile SharingDocument WorkflowSecure File Transfer1 API30.3Adobe Acrobat SignElectronic SignatureDocument WorkflowDigital Signature1 API30.1airSlateDocument AutomationWorkflowsPDF1 API29.5CacheflowCompanyFintechBillingSubscription2 APIs29.3FormstackFormsDocumentsWorkflow Automation1 API28.1
Emerging 5 Early or largely undocumented
Nutrient.ioDocumentsPDFDocument Processing4 APIs24.5ConcordContract ManagementContract Lifecycle ManagementContractsAgreements1 API22.5PeonyCompanyVirtual Data RoomDocument SharingDue Diligence20.5AnduinCompanyPrivate MarketsFund AdministrationInvestor Onboarding17.1GatekeeperContract ManagementContract Lifecycle ManagementVendor ManagementProcurement1 API13.2
Minimal 2 Almost no public developer surface
Indio TechnologiesInsuranceInsurtechInsurance ApplicationsSubmissions7.7GoodlegalCompanyLegalLegal TechDocument Automation0.0
Unrated 1 Not yet scored
TrustWeaverCompanySoftware-as-a-ServiceE-InvoicingCompliance

APIs with this tag (21)

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
Adobe Acrobat Sign APIEmbed e-signature workflows and manage signing agreements programmatically.80.4Adobe Sign APIIntegrate e-signature workflows and document signing.78.3ShareFile API v3The ShareFile API v3 is the OData-based REST interface of Progress ShareFile, covering Items, Folders, Acco...68.9
Strong 3 Solid coverage with minor gaps
imgauth Remote MCP ServerHosted, zero-install MCP server (Streamable HTTP, protocol 2025-06-18) exposing the attestation service to ...65.7Zoho SignThe Zoho Sign API helps developers integrate document signing capabilities within applications, enabling us...65.1Fenergo E Signature APIThe ESignature API from Fenergo — 4 operation(s) for esignature.62.3
Developing 7 Usable, with meaningful gaps to close
Factorial Documents APIManage company- and employee-scoped documents and folders. Create, update, retrieve, and delete documents, ...52.8Lone Wolf Authentisign APIE-signature API for Authentisign, Lone Wolf's signing product. Creates and manages signings, signer roles, ...47.8Anvil Etch E-Sign APIEmbed white-labeled e-signature collection into applications. Create e-sign packets, route documents to mul...46.8Anvil GraphQL APIThe primary query and mutation interface for Anvil. Covers e-sign packets, workflows, PDF operations, webfo...46.8Anvil WebhooksEvent-driven notifications for Anvil workflow events. Receive HTTP POST callbacks when e-sign packets are c...46.8Zinnia Esignature APIE-signature for DocuSign: load recipients, submit the case, poll signer status, cancel ceremony (void envel...44.1dotloop Transaction Management APIRESTful JSON CRUD API for real-estate transaction management - loops, loop details, folders, documents, par...42.6
Thin 7 Limited public surface area
Papersign APIREST API for managing Papersign electronic signature documents, folders, spaces, and webhooks. Requires a s...38.1Dropbox Sign Events and Callbacks APIOutbound event / callback surface for Dropbox Sign. The platform POSTs JSON event payloads (wrapped in a `m...33.5Eversign APIRESTful JSON API for creating and sending documents for electronic signature, managing templates, uploading...32.8Updox Forms APISend electronic intake and consent forms to patients and receive completed submissions, with Forms webhooks...30.9signNow APIREST API for signNow, airSlate's electronic signature product. Covers documents, signatures, templates, use...29.5Xfers E Signature APIAPI for e-signature28.7Formstack Sign APIElectronic signature API for sending documents for signature, tracking status, and retrieving signed copies...28.1
Minimal 1 Almost no public developer surface
IntegrationsPre-built integrations across credit bureaus (FICO LiquidCredit, PayNet, D&B, Experian, Equifax, TransUnion...8.0

Companies reaching this through an API (10)

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 Fenergo Odessa Technologies Progress Software Updox Xfers Zillow Group Zinnia Zoho

Score breakdown

Frequency
53.0
log-scaled weighted occurrences
Breadth
1.7
spread across providers
Quality lift
51.8
mean composite of providers using it
Cohesion
14.3
strength of nearest seed neighbor

Related tags

Electronic Signature 19 co-occurrences PDF 16 co-occurrences Document Management 16 co-occurrences Templates 34 co-occurrences Document Automation 11 co-occurrences Contract Lifecycle Management 9 co-occurrences Documents 38 co-occurrences

Where this tag comes from

Provider tag64
Api tag21
Openapi tag2
Openapi op tag7

Cohort brief

Auto-generated

The 62 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
62
all scored
Mean Kin Score
42.8
+19.9 vs catalog 22.9
Mean Agent Readiness
29.6
+17.7 vs catalog 11.9
Spread
7.7–80.4
median 43.4 · σ 14
How the 62 split by band
Exemplar 3Strong 9Developing 26Thin 18Emerging 5Minimal 1
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 46.3 17.6 +28.7 62
Access Clarity 49 26.5 +22.5 62
Operational Transparency 32.2 13.7 +18.5 62
Developer Ergonomics 38.7 23.2 +15.5 62
Discoverability 67.1 58.1 +9 62
Contract Governance 10.7 6.3 +4.4 62

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) 32% 14% +18
MCP server (first-party) 29% 12% +17
Agent Skills 0% 0% 0
OAuth scopes 37% 11% +26
Security 98% 98% 0
Arazzo workflows 6% 2% +4
Governance rules 33% 14% +19

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 Adobe 80.4
  2. 2 Docusign 69.8
  3. 3 Conga 68
  4. 4 imgauth — API di attestazione opere digitali 65.7
  5. 5 JuriSign 65.3
  6. 6 GetAccept 63.8
  7. 7 Firma.dev 60.5
  8. 8 Dropbox Sign (HelloSign) 59.6
  9. 9 GoNitro 56.8
  10. 10 Nitro Software 56
Top by Agent Readiness
  1. 1 Adobe 65
  2. 2 Anvil 57.9
  3. 3 Common Paper 51.1
  4. 4 Conga 50.5
  5. 5 FormAssembly 50.4
  6. 6 Lone Wolf Technologies 49.3
  7. 7 Sadq 48.2
  8. 8 DocSend 47.1
  9. 9 Dropbox Sign (HelloSign) 44.8
  10. 10 Qwilr 44.6
All 64 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 5 October 2026, across 29093 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

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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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