A
licenseNot graded
qualityB
maintenanceHosted remote MCP server that lets AI agents compose, price, send, and track real physical letters worldwide.
1
MIT
Anvil MCP by usefulapi
by io.usefulapi
Server Details
Hosted MCP server for Anvil — fill & generate PDFs and run Etch e-signature packets for AI agents.
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- Status
- Healthy
- Uptime
- 79.7% over 55 days
- Last Tested
- Transport
- Streamable HTTP · MCP 2025-06-18
- URL
- Repository
- m190/usefulapi-mcp
- GitHub Stars
- 0
TDQS
A3.9/5.0
Scored across 10 tools
Disambiguation5/5
Each tool targets a distinct function: user info, PDF creation/filling, e-signature management, and workflow queries. No two tools have overlapping purposes; even the two PDF tools (fill_pdf vs generate_pdf) are clearly separated by input type.
Naming Consistency5/5
All tools use the 'anvil_' prefix followed by verb_noun in snake_case (e.g., create_etch_packet, get_cast). The pattern is perfectly consistent across all 10 tools.
Tool Count5/5
10 tools cover the major Anvil capabilities (PDF, e-sign, organization, workflows) without unnecessary redundancy. The count is well-scoped for the server's purpose.
Completeness3/5
The set lacks list/update/delete operations for several resources (e.g., no list_casts, no update_etch_packet). While key create and get operations are present, agents may need to work around missing CRUD coverage.
Available Tools
10 toolsanvil_create_etch_packetCreate Etch e-signature packetDestructiveInspect
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.
ParametersJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| data | No | Optional payload data used to pre-fill the packet's documents. | |
| name | Yes | Human-readable name for the packet. | |
| files | No | Array of file/document objects (casts or uploads) to include. Passed straight through to Anvil. | |
| isTest | No | Set true to create a test packet (no legal weight, no charge). | |
| isDraft | No | Default true. When true, creates a draft and sends nothing. Set false to activate and email signers. | |
| signers | No | Array of signer objects, e.g. [{ id, name, email, signerType, routingOrder, fields }]. Passed straight through to Anvil. | |
| signatureEmailBody | No | Optional body text for the signature-request email. | |
| signatureEmailSubject | No | Optional subject line for the signature-request email. |
anvil_current_userCurrent Anvil userRead-onlyInspect
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.
ParametersJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
anvil_fill_pdfFill a PDF templateDestructiveInspect
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.
ParametersJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| data | Yes | Object mapping the template's field aliases to values, e.g. { "name": "Sam", "date": "2026-07-16" }. | |
| title | No | Optional title embedded in the generated PDF metadata. | |
| cast_eid | Yes | The cast (PDF template) eid to fill (from anvil_get_cast). | |
| fontSize | No | Optional default font size for filled text. | |
| textColor | No | Optional default text color as a hex string, e.g. #333333. |
anvil_generate_etch_sign_urlGenerate Etch signing URLDestructiveInspect
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 }.
ParametersJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| signer_eid | Yes | The signer eid (from the packet's documentGroup.signers). | |
| client_user_id | Yes | Your app's stable id for the signing user (ties the session to your user). |
anvil_generate_pdfGenerate a PDF from HTML or MarkdownDestructiveInspect
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 }.
ParametersJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| data | Yes | For html: { html: "<h1>Hi</h1>", css?: "..." }. For markdown: [ { label: "Section", content: "# Title\n..." }, ... ]. | |
| type | No | Source format. Default html. | html |
| title | No | Optional title embedded in the generated PDF metadata. |
anvil_get_castGet cast (PDF template)Read-onlyInspect
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.
ParametersJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| eid | Yes | The cast (PDF template) eid. |
anvil_get_etch_packetGet Etch e-signature packetRead-onlyInspect
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.
ParametersJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| eid | Yes | The Etch packet eid (returned by anvil_create_etch_packet). |
anvil_get_organizationGet organizationRead-onlyInspect
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.
ParametersJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| eid | No | Organization eid. Provide this OR slug. | |
| slug | No | Organization slug (from anvil_current_user). Provide this OR eid. |
anvil_get_weldGet weld (workflow)Read-onlyInspect
Fetch a weld — an Anvil workflow — by eid, including its forges (the individual form steps: eid, name, slug). GraphQL query: weld.
ParametersJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| eid | Yes | The weld (workflow) eid. |
anvil_get_weld_dataGet weld data (workflow submission)Read-onlyInspect
Fetch a weldData record — a single submission to a weld (workflow) — by eid: completion state, test flag, and creation time. GraphQL query: weldData.
ParametersJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| eid | Yes | The weldData (workflow submission) eid. |
Tool Schema Changelog
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
10 tool updates
- Changed
anvil_create_etch_packet1 field changed- changed
Input schema / $schemaPrevious value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
- Changed
anvil_current_user1 field changed- changed
Input schema / $schemaPrevious value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
- Changed
anvil_fill_pdf1 field changed- changed
Input schema / $schemaPrevious value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
- Changed
anvil_generate_etch_sign_url1 field changed- changed
Input schema / $schemaPrevious value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
- Changed
anvil_generate_pdf1 field changed- changed
Input schema / $schemaPrevious value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
- Changed
anvil_get_cast1 field changed- changed
Input schema / $schemaPrevious value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
- Changed
anvil_get_etch_packet1 field changed- changed
Input schema / $schemaPrevious value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
- Changed
anvil_get_organization1 field changed- changed
Input schema / $schemaPrevious value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
- Changed
anvil_get_weld1 field changed- changed
Input schema / $schemaPrevious value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
- Changed
anvil_get_weld_data1 field changed- changed
Input schema / $schemaPrevious value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
10 tool updates
- First observed
anvil_create_etch_packet - First observed
anvil_current_user - First observed
anvil_fill_pdf - First observed
anvil_generate_etch_sign_url - First observed
anvil_generate_pdf - First observed
anvil_get_cast - First observed
anvil_get_etch_packet - First observed
anvil_get_organization - First observed
anvil_get_weld - First observed
anvil_get_weld_data
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