MCP server

Anvil MCP by usefulapi

io.usefulapi/anvil

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Hosted MCP server for Anvil — fill & generate PDFs and run Etch e-signature packets for AI agents.

Website Source

At a glance

Type

MCP server

Publisher

usefulapi.io (verified by the MCP Registry)

Status

Working at last check

Tools

10

Token cost

About 1,884 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http anvil https://anvil.usefulapi.io/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.anvil]
url = "https://anvil.usefulapi.io/mcp"

Gemini CLI

{"mcpServers":{"anvil":{"httpUrl":"https://anvil.usefulapi.io/mcp"}}}

Cursor

{"mcpServers":{"anvil":{"url":"https://anvil.usefulapi.io/mcp"}}}

VS Code

{"servers":{"anvil":{"type":"http","url":"https://anvil.usefulapi.io/mcp"}}}

Antigravity

agy mcp add anvil https://anvil.usefulapi.io/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"anvil","server_url":"https://anvil.usefulapi.io/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"anvil","server_url":"https://anvil.usefulapi.io/mcp"}

Tools

• anvil_create_etch_packet ~476 tokens
  Create an Etch e-signature packet (documents + signers). GraphQL mutation: createEtchPacket. IMPORTANT: isDraft defaults to true (a safe draft that sends nothing). Setting isDraft=false with real signers SENDS signature-request emails to those signers. Use isTest=true while developing.
• anvil_current_user ~100 tokens
  Get the authenticated Anvil user (from the API key) and the organizations they belong to (eid, name, slug). Good first call to discover org slugs/eids for other tools. GraphQL query: currentUser.
• anvil_fill_pdf ~286 tokens
  Fill an Anvil PDF template (cast) with data and return the finished PDF as base64. REST: POST /fill/{castEid}.pdf. Returns { filename, byteLength, pdfBase64 }. The `data` object's keys are the template's field aliases.
• anvil_generate_etch_sign_url ~174 tokens
  Generate a one-time embedded signing URL for a specific signer in an Etch packet (for iframe/redirect signing flows). GraphQL mutation: generateEtchSignURL. Returns { url }.
• anvil_generate_pdf ~223 tokens
  Generate a brand-new PDF from HTML or Markdown and return it as base64. REST: POST /generate-pdf. For type=html, pass data = { html, css? }. For type=markdown, pass data = [ { label, content }, ... ]. Returns { filename, byteLength, pdfBase64 }.
• anvil_get_cast ~119 tokens
  Fetch a cast — an Anvil PDF template — by its eid: title, version number, and whether it is a template. Use the returned eid as the cast_eid for anvil_fill_pdf. GraphQL query: cast.
• anvil_get_etch_packet ~140 tokens
  Fetch an Etch e-signature packet by eid: its status, details URL, document group, and every signer (eid, aliasId, name, email, status, routing order). Use this to check signature progress. GraphQL query: etchPacket.
• anvil_get_organization ~147 tokens
  Fetch an Anvil organization and its PDF templates (casts) and workflows (welds). Provide either its slug or its eid (at least one is required). GraphQL query: organization.
• anvil_get_weld ~104 tokens
  Fetch a weld — an Anvil workflow — by eid, including its forges (the individual form steps: eid, name, slug). GraphQL query: weld.
• anvil_get_weld_data ~115 tokens
  Fetch a weldData record — a single submission to a weld (workflow) — by eid: completion state, test flag, and creation time. GraphQL query: weldData.

Browse

• Website monitoring
• PDF tools
• Converting to Markdown
• E-signatures

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