# Sigil (Sigil.Web) v1.0.29.0

> Sigil is an e-signature service: upload a PDF or Word document with glyphs (short typed codes) marking where people sign, or place the fields by hand, send it to the signers in order as a pact, and get back a stamped PDF sealed with its sigil, a certificate of completion. There is a free plan; paid plans add several signers per pact, the drag-and-drop field editor, custom domains, and API and MCP access.

Sigil is run by Darklight Interactive. The pages below are Markdown copies of the website's; each one's HTML is at the same URL without `.md` (the home page is https://www.signwithsigil.com/). Everything in one file: https://www.signwithsigil.com/llms-full.txt

## Website

- [Sigil: electronic signatures for PDF and Word, without seat licenses](https://www.signwithsigil.com/index.md): What it does, the three steps from upload to signed copy, and the words it uses.
- [How Sigil works](https://www.signwithsigil.com/product.md): Every glyph, the drag-and-drop field editor, sending, signing, the sigil (certificate of completion), custom domains, and the API and MCP server.
- [Pricing](https://www.signwithsigil.com/pricing.md): The plans and what each includes, document packs and the custom-domain add-on at today's prices, and how documents are counted.
- [FAQ: questions and answers](https://www.signwithsigil.com/faq.md): Legal standing, signing order, deadlines, what a pact costs, records and tamper evidence, and where words like pact, glyph and sigil come from.
- [Sigil vs DocuSign](https://www.signwithsigil.com/compare/docusign.md): DocuSign alternative: how Sigil's per-account e-signature pricing, API and MCP server compare with DocuSign's per-user plans, what each does better, and what switching takes.
- [Sigil vs PandaDoc](https://www.signwithsigil.com/compare/pandadoc.md): PandaDoc alternative: how Sigil's per-account e-signature pricing, API and MCP server compare with PandaDoc's per-user plans, what each does better, and what switching takes.
- [Sigil vs Dropbox Sign](https://www.signwithsigil.com/compare/dropbox-sign.md): Dropbox Sign alternative: how Sigil's per-account e-signature pricing, API and MCP server compare with Dropbox Sign's per-user plans, what each does better, and what switching takes.
- [Sigil vs SignNow](https://www.signwithsigil.com/compare/signnow.md): SignNow alternative: how Sigil's per-account e-signature pricing, API and MCP server compare with SignNow's per-user plans, what each does better, and what switching takes.
- [Sigil vs SignWell](https://www.signwithsigil.com/compare/signwell.md): SignWell alternative: how Sigil's per-account e-signature pricing, API and MCP server compare with SignWell's per-user plans, what each does better, and what switching takes.

## The words

A sigil is a seal: the word is Latin *sigillum*, "little sign", and it is where English *seal* comes from. The rest of our vocabulary follows from it. Each word, with its origin: https://www.signwithsigil.com/faq.md

- **Sigil**: The certificate of completion attached to every sealed pact: who signed, when and from where, with the hashes that prove the document is unchanged. Also our name.
- **Pact**: A document sent out for signature, with its signers, their fields and its whole history. Other services call it an envelope.
- **Glyph**: A short code typed into your document, such as `\s1\`, that marks where a field goes and which signer fills it in.
- **Sealed**: A pact is sealed when the last signer finishes: every field is stamped into the PDF, the sigil is attached, and everyone gets the copy.
- **Lapsed**: A pact lapses when its signing deadline passes before everyone has signed. Its links stop working and nothing more can be signed.
- **Void**: A pact the sender withdrew after sending it. Every link stops working at once.

## Developers

- [Developer docs](https://docs.signwithsigil.com/llms.txt): The REST API and MCP server documentation, with its own llms.txt; all of it in one file at https://docs.signwithsigil.com/llms-full.txt.
- [API reference](https://api.signwithsigil.com/v1): The JSON API reference as Markdown, served by the API itself; no key needed.
- [MCP server](https://docs.signwithsigil.com/mcp.md): The hosted MCP server at https://api.signwithsigil.com/mcp: what an assistant can do with it and how to connect one.

## Optional

- [Privacy policy](https://www.signwithsigil.com/privacy.md): What is collected from account holders and signers, why, who else sees it, how long it is kept, and your choices.
- [Terms of use](https://www.signwithsigil.com/terms.md): Accounts, your documents, acceptable use, electronic signatures, plans and billing, custom domains, API access, liability and governing law.
- [Contact](https://www.signwithsigil.com/contact): Questions about Sigil, feedback, or help with a pact: a form, answered by email.