Anvil MCP by usefulapi
REMOTE · ANVIL.USEFULAPI.IO
Hosted MCP server for Anvil — fill & generate PDFs and run Etch e-signature packets for AI agents.
Available components
Last scanned (39 minutes ago)
Scores higher than 4% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Documents and Files
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security46
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not yet verified: we couldn't confirm whether this endpoint requires it. View diagnostics → Unverified
- HTTPS enforcement could not be verified: the plaintext port redirected somewhere other than https, so enforcement is unproven. View diagnostics → Unverified
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability0
- Transport check failed: declared streamable-http, but the endpoint redirected instead of responding directly. See how to fix → View diagnostics → Fail
Schema Quality & AI Usability0
- Schema not yet verified: we couldn't read the endpoint's schema, or could read only part of its tool list.Unverified
Stability & Change Management0
- Stability not yet verified: not enough scan history yet (needs a 30-day window).Unverified
Tool Coverage0
- Tool coverage not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.Unverified
Tool Safety0
- Tool safety not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.Unverified
Capabilities0
- Capabilities not yet verified: we couldn't read the endpoint's capabilities.Unverified
Unverified: 5 categories
Categories scored 0 because we could not verify them: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 2 Nov 26 −61
- Endpoint reachability: reachable → not serving MCP ▼ security
- Stability: 0.93 → unverified ▼ security
- Tool safety: pass → unverified ▼ security
- Authorization: pass → unverified ▼ security
- Schema quality: 100 → unverified ▼ functional
- Capabilities: pass → unverified ▼ functional
- Tool coverage: 100 → unverified ▼ functional
- 1 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 90 to 93. That category is still filling its 30-day observation window: 27 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes.
- 31 Oct 26 +3
- Authorization: partial → pass ▲ security
- MCP protocol: fail → pass ▲ functional
- New prompt “check_the_signature_progress_of_an_etch_packet” functional
- New prompt “check_the_steps_and_a_submission_of_a_workflow” functional
- New prompt “create_an_etch_signature_packet_as_a_draft” functional
- New prompt “fill_a_pdf_template_with_your_data” functional
- New prompt “generate_a_new_pdf_from_html_or_markdown” functional
- New prompt “list_our_pdf_templates_and_workflows” functional
- MCP protocol version: 2025-06-18 → 2025-11-25 functional
- Server version: 1.31.0 → 1.33.0 functional
- Server version: 1.30.0 → 1.31.0 functional
- Server version: 1.29.2 → 1.30.0 functional
- 30 Oct 26 +1
- Server version: 1.29.1 → 1.29.2 functional
- Server version: 1.29.0 → 1.29.1 functional
- 29 Oct 26 0
- Server version: 1.28.0 → 1.29.0 functional
- Server version: 1.27.0 → 1.28.0 functional
- 28 Oct 26 −3
- Stability: pass → 0.80 functional
- Server version: 1.25.0 → 1.27.0 functional
- 27 Oct 26 0
- Server version: 1.24.0 → 1.25.0 functional
- 25 Oct 26 0
- Server version: 1.23.0 → 1.24.0 functional
- Server version: 1.22.0 → 1.23.0 functional
- Server version: 1.21.3 → 1.22.0 functional
- Server version: 1.21.0 → 1.21.3 functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Probed https://anvil.usefulapi.io/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=usefulapi.io | CN=WE1,O=Google Trust Services,C=US | 13 Sept 2026 | 12 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | d9be3287b0fde9630e825ba1f79bff3f |
| SANs: usefulapi.io, *.usefulapi.io | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of anvil.usefulapi.io. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| io. | present | 38690 | 8 | Verified |
| usefulapi.io. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication Inconclusive
We could not reach the endpoint well enough to judge its authorisation posture.
| Result | Inconclusive |
|---|---|
| HTTP status | 302 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://anvil.usefulapi.io/mcp | Redirected | 302 | https://usefulapi.io/anvil/ |
| http (plaintext) | http://anvil.usefulapi.io/mcp | Inconclusive | 302 | http://anvil.usefulapi.io/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
anvil_create_etch_packet Create Etch e-signature packet ~255
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.
| Name | Type | Req | Description |
|---|---|---|---|
| data | object | – | Optional payload data used to pre-fill the packet's documents. |
| files | array | – | Array of file/document objects (casts or uploads) to include. Passed straight through to Anvil. |
| isDraft | boolean | – | Default true. When true, creates a draft and sends nothing. Set false to activate and email signers. |
| isTest | boolean | – | Set true to create a test packet (no legal weight, no charge). |
| name | string | yes | Human-readable name for the packet. |
| signatureEmailBody | string | – | Optional body text for the signature-request email. |
| signatureEmailSubject | string | – | Optional subject line for the signature-request email. |
| signers | array | – | Array of signer objects, e.g. [{ id, name, email, signerType, routingOrder, fields }]. Passed straight through to Anvil. |
No output schema declared.
No examples provided.
anvil_current_user Current Anvil user ~56
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.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
anvil_fill_pdf Fill a PDF template ~182
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.
| Name | Type | Req | Description |
|---|---|---|---|
| cast_eid | string | yes | The cast (PDF template) eid to fill (from anvil_get_cast). |
| data | object | yes | Object mapping the template's field aliases to values, e.g. { "name": "Sam", "date": "2026-07-16" }. |
| fontSize | number | – | Optional default font size for filled text. |
| textColor | string | – | Optional default text color as a hex string, e.g. #333333. |
| title | string | – | Optional title embedded in the generated PDF metadata. |
No output schema declared.
No examples provided.
anvil_generate_etch_sign_url Generate Etch signing URL ~98
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 }.
| Name | Type | Req | Description |
|---|---|---|---|
| client_user_id | string | yes | Your app's stable id for the signing user (ties the session to your user). |
| signer_eid | string | yes | The signer eid (from the packet's documentGroup.signers). |
No output schema declared.
No examples provided.
anvil_generate_pdf Generate a PDF from HTML or Markdown ~147
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 }.
| Name | Type | Req | Description |
|---|---|---|---|
| data | – | yes | For html: { html: "<h1>Hi</h1>", css?: "..." }. For markdown: [ { label: "Section", content: "# Title\n..." }, ... ]. |
| title | string | – | Optional title embedded in the generated PDF metadata. |
| type | string | – | Source format. Default html. |
No output schema declared.
No examples provided.
anvil_get_cast Get cast (PDF template) ~71
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.
| Name | Type | Req | Description |
|---|---|---|---|
| eid | string | yes | The cast (PDF template) eid. |
No output schema declared.
No examples provided.
anvil_get_etch_packet Get Etch e-signature packet ~86
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.
| Name | Type | Req | Description |
|---|---|---|---|
| eid | string | yes | The Etch packet eid (returned by anvil_create_etch_packet). |
No output schema declared.
No examples provided.
anvil_get_organization Get organization ~84
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.
| Name | Type | Req | Description |
|---|---|---|---|
| eid | string | – | Organization eid. Provide this OR slug. |
| slug | string | – | Organization slug (from anvil_current_user). Provide this OR eid. |
No output schema declared.
No examples provided.
anvil_get_weld Get weld (workflow) ~58
Fetch a weld — an Anvil workflow — by eid, including its forges (the individual form steps: eid, name, slug). GraphQL query: weld.
| Name | Type | Req | Description |
|---|---|---|---|
| eid | string | yes | The weld (workflow) eid. |
No output schema declared.
No examples provided.
anvil_get_weld_data Get weld data (workflow submission) ~63
Fetch a weldData record — a single submission to a weld (workflow) — by eid: completion state, test flag, and creation time. GraphQL query: weldData.
| Name | Type | Req | Description |
|---|---|---|---|
| eid | string | yes | The weldData (workflow submission) eid. |
No output schema declared.
No examples provided.
How do I install the Anvil MCP by usefulapi server?
Anvil MCP by usefulapi is a hosted endpoint at https://anvil.usefulapi.io/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · anvil.usefulapi.io
claude mcp add --transport http io-usefulapi-anvil 'https://anvil.usefulapi.io/mcp'
What is the Anvil MCP by usefulapi server?
Anvil MCP by usefulapi is listed in the public MCP registry as io.usefulapi/anvil. Hosted MCP server for Anvil, fill & generate PDFs and run Etch e-signature packets for AI agents. This page covers its hosted endpoint (https://anvil.usefulapi.io/mcp).
Is the Anvil MCP by usefulapi server safe to use?
Anvil MCP by usefulapi scores 18 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Anvil MCP by usefulapi server expose?
Anvil MCP by usefulapi exposes 10 tools: anvil_current_user, anvil_get_organization, anvil_get_cast, anvil_get_etch_packet, anvil_get_weld, and 5 more. Their descriptions and schemas cost roughly 1,100 tokens of context every time the server is loaded.
Does the Anvil MCP by usefulapi server require authentication?
Its publisher declares no required credentials for Anvil MCP by usefulapi. We have not been able to confirm that against the live endpoint, and a server can require authorisation without declaring it here.
Is the Anvil MCP by usefulapi server still maintained?
Anvil MCP by usefulapi is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.