E-Signature
Variants seen in the corpus:
E-SignatureE-signatureEsignaturee-signatureeSignature
Providers using this tag (62)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Exemplar 1 Complete, well-documented, and agent-ready
Strong 9 Solid coverage with minor gaps
Developing 26 Usable, with meaningful gaps to close
Thin 18 Limited public surface area
Emerging 4 Early or largely undocumented
Minimal 4 Almost no public developer surface
APIs with this tag (16)
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
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 ...imgauth REST APIAttestation/proof-of-existence REST API. Client-side SHA-256 hashing, signed PDF certificates, RFC 3161 tim...Swisscom Sign Integration APIREST API that lets backend systems create, configure, release and monitor digital signature processes end t...Conga Advantage Platform REST APIThe Conga Advantage Platform REST API exposes Conga's Revenue Lifecycle Management services - Contract Life...
Developing 3 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, ...Factorial Documents APIManage company- and employee-scoped documents and folders. Create, update, retrieve, and delete documents, ...Eversign APIRESTful JSON API for creating and sending documents for electronic signature, managing templates, uploading...
Thin 6 Limited public surface area
Dropbox Sign Events and Callbacks APIOutbound event / callback surface for Dropbox Sign. The platform POSTs JSON event payloads (wrapped in a `m...signNow APIREST API for signNow, airSlate's electronic signature product. Covers documents, signatures, templates, use...Papersign APIREST API for managing Papersign electronic signature documents, folders, spaces, and webhooks. Requires a s...Cacheflow APIREST API for the full Cacheflow quote-to-cash surface: proposals (quotes) and proposal items, product catal...Formstack Sign APIElectronic signature API for sending documents for signature, tracking status, and retrieving signed copies...Xfers E-signature APIAPI for e-signature
Emerging 1 Early or largely undocumented
Minimal 1 Almost no public developer surface
Score breakdown
Frequency
51.2
log-scaled weighted occurrences
Breadth
1.7
spread across providers
Quality lift
50.5
mean composite of providers using it
Cohesion
14.0
strength of nearest seed neighbor
Related tags
Electronic Signature 13 co-occurrences
Document-Management 14 co-occurrences
PDF 12 co-occurrences
Templates 27 co-occurrences
CLM 7 co-occurrences
Document Automation 9 co-occurrences
Contract Lifecycle Management 7 co-occurrences
Envelopes 5 co-occurrences
Where this tag comes from
Provider tag56
Api tag16
Openapi tag1
Openapi op tag3
Cohort brief
Auto-generatedThe 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
40.7
+20.0 vs catalog 20.7
Mean Agent Readiness
27
+17.3 vs catalog 9.7
Spread
5–71.2
median 41.2 · σ 14.5
How the 62 split by band
Exemplar 1Strong 9Developing 26Thin 18Emerging 4Minimal 4
Facet averages, against the whole catalog
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Contract Quality | 49 | 17.5 | +31.5 | 62 |
| Access Clarity | 44.7 | 22.3 | +22.4 | 62 |
| Operational Transparency | 29.1 | 11.3 | +17.8 | 62 |
| Developer Ergonomics | 35 | 17.9 | +17.1 | 62 |
| Discoverability | 72.4 | 60.4 | +12 | 62 |
| Contract Governance | 11 | 6.4 | +4.6 | 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
| Artifact | This cohort | Catalog | Difference |
|---|---|---|---|
| MCP server (any) | 34% | 16% | +18 |
| MCP server (first-party) | 18% | 7% | +11 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 37% | 9% | +28 |
| Security | 97% | 88% | +9 |
| Arazzo workflows | 5% | 2% | +3 |
| Governance rules | 27% | 13% | +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 Adobe Suite 71.2
- 2 imgauth — API di attestazione opere digitali 65.7
- 3 Swisscom 63.8
- 4 Conga 61.5
- 5 GetAccept 61.1
- 6 Dropbox Sign (HelloSign) 60.7
- 7 GoNitro 59.8
- 8 Docusign 58.2
- 9 Nitro Software 57.5
- 10 Ironclad 54.4
Top by Agent Readiness
- 1 Adobe Suite 61.5
- 2 Dropbox Sign (HelloSign) 51.3
- 3 Sadq Holding Limited 50.3
- 4 Lone Wolf Technologies 49.3
- 5 Swisscom 48
- 6 DocSend 47.1
- 7 Conga 45.3
- 8 Hubflo 44.4
- 9 Qwilr 41.6
- 10 Lawmatics 40.5
All 62 members of this roster resolve to a scored provider in
the catalog.Generated from the catalog build of
25 August 2026, across 26891
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.
MCP server
One button, every client — Claude, Cursor, VS Code and the rest.
https://apis.io/mcp
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.
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"Discovery needs no key. Ratings and market analysis are Pro.