Help inspect and fill PDF forms, find signature locations, add a visible signature stamp with the person's confirmation, and flatten a reviewed form using the hosted PDF Forms tools.

MITAuto-check passedDocuments & Office

Install PDF Forms

skills CLI
$ npx skills add Open-Document-Alliance/PDF-Tools --skill pdf-forms -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install Open-Document-Alliance/PDF-Tools pdf-forms --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/Open-Document-Alliance/PDF-Tools.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/pdf-forms/skills/pdf-forms .claude/skills/pdf-forms && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
pdf-forms
GitHub stars
160
Token cost
~729 tokens
SKILL.md length
425 words
Files
1
Skills in repo
3
Repo updated
First seen
Licence
MIT

At a glance

Help inspect and fill PDF forms, find signature locations, add a visible signature stamp with the person's confirmation, and flatten a reviewed form using the hosted PDF Forms tools.

  • Works in 5 steps: Call read_form_fields and use exact… → Ask for missing values. Do not guess… → Call fill_form with only the user's… → …
  • Tasks that involve PDF
  • SKILL.md covers Supply and return the PDF, Fill and verify, Signature stamps and Flatten
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

PDF Forms is an agent skill from Open-Document-Alliance/PDF-Tools. Help inspect and fill PDF forms, find signature locations, add a visible signature stamp with the person's confirmation, and flatten a reviewed form using the hosted PDF Forms tools.

Its SKILL.md is about 730 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Documents & Office, covering PDF. It works with Model Context Protocol. The repository describes itself as: Fill, sign, merge, split, and extract PDFs from Claude Desktop and other MCP hosts. Maintained by the Open Document Alliance. The licence is MIT.

When your agent uses it

  • Tasks that involve PDF

Example prompts

  • “/pdf-forms”

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

  1. Call read_form_fields and use exact field names from its result.
  2. Ask for missing values. Do not guess what a coded field represents.
  3. Call fill_form with only the user's supplied values.
  4. Check both filled and not_filled, and read back the returned PDF to
  5. Never claim the form is complete, accurate, legally valid, or ready to

What it can do on your machine

Read from SKILL.md and the folder at commit f1aaa18. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

PDF Forms loads about 729 tokens when it runs. Until then it costs about 48 tokens; SKILL.md has 425 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~48
When it runs · the whole SKILL.md, loaded when a task matches
~729

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from Open-Document-Alliance/PDF-Tools at commit f1aaa18, republished under its MIT licence (© Open-Document-Alliance). 425 words, ~729 tokens.

Download SKILL.mdSave it as .claude/skills/pdf-forms/SKILL.md (or your agent's skills folder).
name
pdf-forms
description
Help inspect and fill PDF forms, find signature locations, add a visible signature stamp with the person's confirmation, and flatten a reviewed form using the hosted PDF Forms tools.

PDF Forms

Use the configured pdf-forms MCP server. This is the hosted five-tool edition, not the full local PDF Tools application. It provides no local file access, viewer, saved profiles, extraction workspace, or Lumin signing.

Supply and return the PDF

Each call requires the PDF as pdf_url or pdf_base64, never both. Only send a document the user has supplied for this task and knows will be processed by the hosted service. Never upload a private document to another service to obtain a public URL. Do not invent document URLs, field values, or attachment access. If the host cannot provide the PDF bytes or an authorized URL, explain that limitation and request a supported input. Do not claim to have opened it.

Inline input is limited to 3 MB, fetched PDFs to 25 MB, and documents to 200 pages. Returned PDFs are inline base64, with host transfer limits. Encrypted PDFs are refused. PDF Tools does not store the documents; content returned to the assistant is governed by the host's data terms.

Use the host's supported file-output mechanism for returned PDF bytes. Never present base64 as a download link or invent a file. If the host cannot produce an accessible output file, state that the output handoff is unsupported.

Fill and verify

  1. Call read_form_fields and use exact field names from its result.
  2. Ask for missing values. Do not guess what a coded field represents.
  3. Call fill_form with only the user's supplied values.
  4. Check both filled and not_filled, and read back the returned PDF to confirm its field values. Report every unfilled or unsupported field.
  5. Never claim the form is complete, accurate, legally valid, or ready to submit just because filling succeeded.
Show full SKILL.md (141 more words)Show less

Signature stamps

Call detect_signature_zones first and preserve its top-left coordinates. Before apply_signature, obtain the person's name and their own statement confirming intent to apply the visible stamp. Preserve the exact statement and the time of their actual confirmation. Never invent either required field. The statement must be recent, and an earlier unrelated approval is not consent. Clearly explain that a visible stamp is not a cryptographic signature or a Lumin signing request. A request to inspect or fill is not permission to sign.

Flatten

Call flatten_form only when the user wants fields converted into fixed page content. Return a new output rather than claiming the original was overwritten. Explain that further form-field editing is no longer available in that copy. Report tool refusals and host/output limitations candidly; do not retry with different inputs to bypass encryption, signature, size, or network safeguards.

© Open-Document-Alliance, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in plugins/pdf-forms/skills/pdf-forms of Open-Document-Alliance/PDF-Tools.

Open the folder on GitHubat commit f1aaa18

Compare with similar skills

PDF Forms next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

PDF Forms compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
PDF Forms this skillOpen-Document-Alliance/PDF-Tools160—~729Automated safety check: PassMIT
Docsagentdocsagent/docsagent625—~834Automated safety check: PassNone
Nutrient Document Processingaffaan-m/ECC275k4 repos~1.5kAutomated safety check: PassMIT
Nano PDFswarmclawai/swarmclaw688—~379Automated safety check: PassMIT
Nutrient Document Processingaffaan-m/ECC275k3 repos~1.3kAutomated safety check: PassMIT
Nutrient Document Processingaffaan-m/ECC275k2 repos~1.3kAutomated safety check: PassMIT

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Questions about PDF Forms

What does PDF Forms do?

Help inspect and fill PDF forms, find signature locations, add a visible signature stamp with the person's confirmation, and flatten a reviewed form using the hosted PDF Forms tools. PDF Forms is an agent skill from Open-Document-Alliance/PDF-Tools. Help inspect and fill PDF forms, find signature locations, add a visible signature stamp with the person's confirmation, and flatten a reviewed form using the hosted PDF Forms tools.

When should I use PDF Forms?

PDF Forms fits situations like: tasks that involve PDF.

How do I install PDF Forms in Claude Code?

Run `npx skills add Open-Document-Alliance/PDF-Tools --skill pdf-forms -a claude-code`. Or copy the skill folder (plugins/pdf-forms/skills/pdf-forms in Open-Document-Alliance/PDF-Tools) into .claude/skills/pdf-forms in your project. Claude Code loads it when a task matches its description.

How do I install PDF Forms in Codex?

Run `npx skills add Open-Document-Alliance/PDF-Tools --skill pdf-forms -a codex`. Or copy the skill folder (plugins/pdf-forms/skills/pdf-forms in Open-Document-Alliance/PDF-Tools) into .agents/skills/pdf-forms in your project. Codex loads it when a task matches its description.

Can I use PDF Forms in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add Open-Document-Alliance/PDF-Tools --skill pdf-forms -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/pdf-forms, .gemini/skills/pdf-forms, .github/skills/pdf-forms and .opencode/skills/pdf-forms in your project.

What does PDF Forms need to run?

SKILL.md names no scripts, command-line tools or credentials: PDF Forms is instructions for the agent only.

Does PDF Forms access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is PDF Forms safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does PDF Forms use?

PDF Forms is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does PDF Forms use?

About 729 tokens (SKILL.md is roughly 2.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to PDF Forms?

Skills that share tags, products or a category with PDF Forms: Docsagent (docsagent/docsagent, 625 stars), Nutrient Document Processing (affaan-m/ECC, 275k stars), Nano PDF (swarmclawai/swarmclaw, 688 stars) and Nutrient Document Processing (affaan-m/ECC, 275k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains PDF Forms?

Open-Document-Alliance (a GitHub organization) maintains it in Open-Document-Alliance/PDF-Tools, which has 160 GitHub stars. The repository holds 3 skills in this directory. The repository was last updated on October 7, 2026.

Source: Open-Document-Alliance/PDF-Tools on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.