How do I install the Openapi Esignature skill?

Run npx skillmds@latest add openapi/openapi-esignature in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Openapi Esignature safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Openapi Esignature?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Openapi Esignature free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Openapi Esignature?

openapi (@openapi) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Openapi Esignature by openapi — Agent Skill

Name: Openapi Esignature
Author: openapi

Openapi Esignature

Digital signatures and time stamps through Openapi - eIDAS-compliant electronic signatures (SES with OTP, qualified QES, e-seals, massive automatic signing) and qualified time stamping of documents. Use when the user needs a document signed electronically or time-stamped with legal validity.

openapi 93d7579 2.1 KB Updated Sep 17, 2026

File contents

Openapi eSignature & time stamping

Bearer token required (see the openapi-auth skill). Signing and stamping are paid, legally binding actions — confirm with the user before submitting documents.

eSignature — `https://esignature.openapi.com`

eIDAS-compliant signatures with European legal validity.

Signature types

POST /EU-SES — Simple Electronic Signature for one or more signers, secured via OTP
POST /EU-QES_otp — Qualified Electronic Signature with remote OTP certificate
POST /EU-QES_automatic — massive automatic QES (high volume)
POST /EU-QES_eseal — qualified electronic seal (legal-entity seal)
POST /verify — verify an existing signature

Certificates and results

POST /certificates/namirial-otp / POST /certificates/namirial-automatic — purchase signing certificates
GET /certificates, GET /certificates/{id} — list/inspect certificates
GET /signatures — list signature processes
GET /signatures/{id}/{actionType} — download the signed document, details, audit trail, or validated document
DELETE /signatures/{id} — delete signature artifacts

Typical flow: ensure a certificate exists → create the signature request with the PDF and signer details → signers complete via OTP where applicable → download the signed document and audit trail.

Time Stamping (Marche Temporali) — `https://ws.marchetemporali.com`

Purchase qualified timestamps and apply them to documents (buy batches, stamp a document, verify stamps).

Legacy Digital Signature (ws.firmadigitale.com — Infocert/Aruba kits) is deprecated; use eSignature for new integrations.

Full specs: https://console.openapi.com/oas/en/esignature.openapi.json · https://console.openapi.com/oas/en/marchetemporali.openapi.json

---name: openapi-esignaturedescription: Digital signatures and time stamps through Openapi - eIDAS-compliant electronic signatures (SES with OTP, qualified QES, e-seals, massive automatic signing) and qualified time stamping of documents. Use when the user needs a document signed electronically or time-stamped with legal validity.---# Openapi eSignature & time stampingBearer token required (see the `openapi-auth` skill). Signing and stamping are paid, legally binding actions — confirm with the user before submitting documents.## eSignature — `https://esignature.openapi.com`eIDAS-compliant signatures with European legal validity.### Signature types- `POST /EU-SES` — Simple Electronic Signature for one or more signers, secured via OTP- `POST /EU-QES_otp` — Qualified Electronic Signature with remote OTP certificate- `POST /EU-QES_automatic` — massive automatic QES (high volume)- `POST /EU-QES_eseal` — qualified electronic seal (legal-entity seal)- `POST /verify` — verify an existing signature### Certificates and results- `POST /certificates/namirial-otp` / `POST /certificates/namirial-automatic` — purchase signing certificates- `GET /certificates`, `GET /certificates/{id}` — list/inspect certificates- `GET /signatures` — list signature processes- `GET /signatures/{id}/{actionType}` — download the signed document, details, audit trail, or validated document- `DELETE /signatures/{id}` — delete signature artifactsTypical flow: ensure a certificate exists → create the signature request with the PDF and signer details → signers complete via OTP where applicable → download the signed document and audit trail.## Time Stamping (Marche Temporali) — `https://ws.marchetemporali.com`Purchase qualified timestamps and apply them to documents (buy batches, stamp a document, verify stamps).Legacy **Digital Signature** (`ws.firmadigitale.com` — Infocert/Aruba kits) is **deprecated**; use eSignature for new integrations.Full specs: https://console.openapi.com/oas/en/esignature.openapi.json · https://console.openapi.com/oas/en/marchetemporali.openapi.json

Frequently asked questions