Spec Driven Development
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Description from the maker (original English)
Read documents, signatures, contacts and credits; manage contacts and remove documents.
These three are never merged into one score: opinions, measurements and popularity are different things.
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
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Works in Claude on the web, desktop and mobile:
https://oksign.usefulapi.io/mcpRun this in your terminal
claude mcp add --transport http oksign https://oksign.usefulapi.io/mcpPaste 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.
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:
https://oksign.usefulapi.io/mcpMenu 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.
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_creditsThe 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_usersThe 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_templatesThe email templates defined in the account: id, name, subject, HTML body, reminder_days and repeat. GET /v1/email-templates/retrieve.
oksign_list_contactsThe account's contact list: name, email, mobile, actingas (capacity) and group. GET /v1/contacts/retrieve.
oksign_list_active_documentsDocuments 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_documentsDocuments 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_errorsEmail 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_existsWhether a (signed) document still exists on the platform; returns its filename and whether it is a template. GET /v1/document/exists.
oksign_get_document_metadataMetadata 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_descriptorThe 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_documentGiven 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_contactsWRITE: 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_contactsWRITE: 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_documentWRITE: 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.
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
The registry name was verified against the domain usefulapi.io (the registry checks domain ownership)
We have not read this repo from GitHub yet
We have not read this repo from GitHub yet
Responded in 47 ms (HTTP 200)
No sign-in needed
Read 14 tool descriptions and found no hidden instructions to the AI
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
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.
The registry does not list a required key, though some servers ask you to sign in on first use.
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.
The GitHub repo last changed –, and the latest version (1.8.3) reached the registry yesterday.
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.
In the same category: Spec Driven Development, Remote Desktop Commander, BankBridge
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
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.
Works in any MCP agent, including local models. Read-only bank accounts, spending, investments.
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.
Connect at https://oksign.usefulapi.io/mcp.
https://oksign.usefulapi.io/mcp.claude mcp add --transport http oksign https://oksign.usefulapi.io/mcp, then run /mcp to log in.{
"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.
| Tool | Type | What it does |
|---|---|---|
oksign_get_credits | read | Get credits and storage |
oksign_list_users | read | List users |
oksign_list_email_templates | read | List email templates |
oksign_list_contacts | read | List contacts |
oksign_list_active_documents | read | List active documents |
oksign_list_signed_documents | read | List signed documents |
oksign_list_notification_errors | read | List email and SMS delivery errors |
oksign_document_exists | read | Check a document exists |
oksign_get_document_metadata | read | Get signed document metadata |
oksign_get_form_descriptor | read | Get a document's form descriptor |
oksign_get_linked_document | read | Find the source or signed copy of a document |
oksign_upsert_contacts | write | Add or update contacts |
oksign_remove_contacts | write | Remove contacts |
oksign_remove_document | write | Remove a document |
oksign_usage_status | meta | Usage status (free-tier meter) |
oksign_request_feature | meta | Request a missing feature |
oksign_upgrade | meta | Upgrade to Pro or Pro+ |
oksign_cancel_subscription | meta | Cancel 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.
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 50 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.