# 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.

- **Type:** Skill
- **Install:** `agentstack add skill-openapi-openapi-skills-openapi-esignature`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [openapi](https://agentstack.voostack.com/s/openapi)
- **Installs:** 0
- **Category:** [AI & ML](https://agentstack.voostack.com/c/ai-and-ml)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [openapi](https://github.com/openapi)
- **Source:** https://github.com/openapi/openapi-skills/tree/main/skills/openapi-esignature
- **Website:** https://openapi.com

## Install

```sh
agentstack add skill-openapi-openapi-skills-openapi-esignature
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# 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

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [openapi](https://github.com/openapi)
- **Source:** [openapi/openapi-skills](https://github.com/openapi/openapi-skills)
- **License:** MIT
- **Homepage:** https://openapi.com

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-openapi-openapi-skills-openapi-esignature
- Seller: https://agentstack.voostack.com/s/openapi
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.