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PopNx MCPMCP servers for people who use AI · explained in plain words

OKSign MCP by usefulapi

by m190version 1.8.3i★ –iRuns in the cloud
Registry nameio.usefulapi/oksign

Install

Overview

Description from the maker (original English)

Read documents, signatures, contacts and credits; manage contacts and remove documents.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Install

Pick the AI app you use, then copy the settings.

Before you install

  • Basic checks: 3 of 3 passed
  • Runs on the maker’s server: what you ask it goes through their server.
  • Can do 14 things (tools) oksign_get_credits, oksign_list_users, oksign_list_email_templates, oksign_list_contacts …
  • The registry lists no key to fill in.

You need

Which app do you use?

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

  1. Open Settings → Connectors
  2. Press Add custom connector
  3. Paste the address below and press Add
  4. If it asks you to sign in, sign in with the maker
SettingsConnectors1+ Add2https://…3
https://oksign.usefulapi.io/mcp

Run this in your terminal

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

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

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

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

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

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

  1. Open ChatGPT on the web → Settings → Connectors (Apps)
  2. Press Create or Add (some plans need Developer mode under Advanced first)
  3. Paste the address below, give it a name and save
  4. If it asks you to sign in, sign in with the maker
SettingsConnectors1+ Create2https://…3
https://oksign.usefulapi.io/mcp

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Tool names and descriptions exactly as the server reported them on Nov 6, 2026. The maker wrote them, not us; we show them as plain text.

  • oksign_get_credits

    The account's remaining credits (quantity), when they expire (validuntil), the plan (subscription), whether it is paid, and storage used (account_size) versus the maximum (max_account_size) in bytes. GET /v1/credits/retrieve.

  • oksign_list_users

    The users of the OKsign account: name, email, mobile, role, status, language and the immutable signerid (use it to tell who signed). GET /v1/users/retrieve.

  • oksign_list_email_templates

    The email templates defined in the account: id, name, subject, HTML body, reminder_days and repeat. GET /v1/email-templates/retrieve.

  • oksign_list_contacts

    The account's contact list: name, email, mobile, actingas (capacity) and group. GET /v1/contacts/retrieve.

  • oksign_list_active_documents

    Documents in the account's Active Documents tab: docid, filename, creator, createdate, signatures required/valid, orgtoken, status (1 active, 10 briefcase, 11 document in a briefcase, 12 reusable, 14 template), viaapi and signed_docid when signed. OKsign allows this call only onc

  • oksign_list_signed_documents

    Documents uploaded through the API that were signed between two moments: signed_docid, source_docid, filename, signerid, signing source, signature counts, completed fields, credits per signer and timestamp. Keep the window short; OKsign allows this call only once every 3 minutes

  • oksign_list_notification_errors

    Email and SMS delivery problems (hard_bounce, soft_bounce, blocked, spam, invalid_email, deferred) for signing invitations sent between two moments: recipient, source_docid, reason, orgtoken and timestamp. Only error events are reported. OKsign allows this call only once every 3

  • oksign_document_exists

    Whether a (signed) document still exists on the platform; returns its filename and whether it is a template. GET /v1/document/exists.

  • oksign_get_document_metadata

    Metadata of a signed document (pass the signed_docid): filename, size, signatures required/valid, who signed, and the values of all completed fields (can contain personal data). Metadata v2. GET /v2/metadata/retrieve.

  • oksign_get_form_descriptor

    The form descriptor of an uploaded document: its signature and form fields (type, page, position, signer, required, signing options) and the signing URL of each signer. The URLs let their holders sign, so share them only with the signer. GET /v1/formdesc/retrieve.

  • oksign_get_linked_document

    Given a source_docid, the signed_docid of its signed copy (absent if not signed yet) and the timestamp; given a signed_docid, the source_docid. An empty result means the document never existed here or was removed. GET /v1/linkedlist/retrieve.

  • oksign_upsert_contacts

    WRITE: add contacts to the account's contact list, or update them when a contact with the same email AND name exists (its other fields are replaced). Existing contacts are never cleared. Contacts OKsign rejects are skipped and reported. POST /v1/contacts/upload.

  • oksign_remove_contacts

    WRITE: permanently remove contacts from the account's contact list. A contact is identified by its email AND name. Cannot be undone (re-add with oksign_upsert_contacts). POST /v1/contacts/remove.

  • oksign_remove_document

    WRITE: permanently remove a (signed) document from the OKsign platform. This deletes the file and its pending webhook events and cannot be undone. A signed document removed right after its callback may answer 'Too soon': retry later. DELETE /v1/document/remove.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

  • ✓ Pass

    Maker matches the repo

    The registry name was verified against the domain usefulapi.io (the registry checks domain ownership)

  • … Not checked yet

    Still maintained

    We have not read this repo from GitHub yet

  • … Not checked yet

    Has a licence

    We have not read this repo from GitHub yet

  • ✓ Pass

    Endpoint responds

    Responded in 47 ms (HTTP 200)

  • – Not applicable

    Sign-in with OAuth

    No sign-in needed

  • ✓ Pass

    No hidden instructions in tool descriptions

    Read 14 tool descriptions and found no hidden instructions to the AI

Compared with others in Otheri

  • More stars than 0% of the other 32424 servers in this category
  • Published to the registry more recently than 97% of the other 32424 servers in this category
  • Basic checks equal to or better than 100% of the other 32424 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is OKSign MCP by usefulapi safe?

It passed 3 of 3 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.8.3) reached the registry yesterday.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, BankBridge

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Spec Driven Development

by formulahendry

MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.

Runs on your computer★ 440MITUpdated 14 months ago
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Remote Desktop Commander

by desktop-commander

Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.

Runs in the cloud★ 211Updated yesterday
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BankBridge

by bankbridge-money

Works in any MCP agent, including local models. Read-only bank accounts, spending, investments.

Runs in the cloudUpdated today
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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

OKSign MCP by usefulapi

Connect at https://oksign.usefulapi.io/mcp.

Connect

  • Claude (claude.ai, Desktop): open Customize → Connectors, click + Add → Add custom connector, and paste https://oksign.usefulapi.io/mcp.
  • Claude Code: claude mcp add --transport http oksign https://oksign.usefulapi.io/mcp, then run /mcp to log in.
  • VS Code: Add to VS Code.
  • Cursor and other clients: add the URL as a remote MCP server:
{

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

Add only the URL. Do not add an Authorization header or an API key to the client config: the server signs you in with OAuth, and the login page asks for your OKSign credentials.

Step-by-step setup, where to find your credentials, and FAQ: https://usefulapi.io/oksign/

Connect your OKSign credentials to access your account through usefulapi.

Tools

ToolTypeWhat it does
oksign_get_creditsreadGet credits and storage
oksign_list_usersreadList users
oksign_list_email_templatesreadList email templates
oksign_list_contactsreadList contacts
oksign_list_active_documentsreadList active documents
oksign_list_signed_documentsreadList signed documents
oksign_list_notification_errorsreadList email and SMS delivery errors
oksign_document_existsreadCheck a document exists
oksign_get_document_metadatareadGet signed document metadata
oksign_get_form_descriptorreadGet a document's form descriptor
oksign_get_linked_documentreadFind the source or signed copy of a document
oksign_upsert_contactswriteAdd or update contacts
oksign_remove_contactswriteRemove contacts
oksign_remove_documentwriteRemove a document
oksign_usage_statusmetaUsage status (free-tier meter)
oksign_request_featuremetaRequest a missing feature
oksign_upgrademetaUpgrade to Pro or Pro+
oksign_cancel_subscriptionmetaCancel the Pro subscription

read tools are read-only; write tools mutate data (clients should confirm them); meta tools report usage, manage your subscription or send a feature request.

Pricing

PlanPriceLimit
Free$050 tool calls / month
Pro (per connected account)$9/mo or $90/yr (2 months free)10,000 tool calls / month

Pro covers this server only. Subscribe with oksign_upgrade (it returns a Stripe Checkout link). Cancel any time with oksign_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running oksign_upgrade before then undoes the cancel. Or write to support@usefulapi.io.

License

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