Solo MCP by usefulapi

io.usefulapiPublished by usefulapi.ioOfficial publisherv1.5.4Updated Nov 7, 2026

Read invoices, offers, payment status and the product catalog in Solo.

The publisher's own server: Ably MCP by usefulapi

VerifiedStreamable HTTPWeb executableFinanceBusiness & Commerce

Overview

AI-generated overview

Hosted MCP server that lets an assistant read invoices, offers, payment status and the product catalog from a Solo account.

What you can do
  • List and read invoices, with buyer, line items, taxes, totals, IBAN, currency and PDF link
  • Check the payment status and payment date of individual invoices
  • List and read offers, with line items, totals, dates and PDF link
  • Check the status of individual offers
  • List catalog products and services with code, KPD code, unit, price, discount and tax rate
  • Check monthly usage, request a feature, upgrade or cancel the subscription
When to use it
Useful when you keep invoices, offers and a product catalog in Solo and want an assistant to answer questions about them, such as which invoices are unpaid or which offers are still open, without exporting data by hand.
Requirements
Remote endpoint at solo.usefulapi.io over streamable HTTP; no local install. Sign-in uses OAuth, and on first connect you supply your Solo API token (from Solo Settings). No API key or Authorization header goes in the client config.
Before you install
The server stores your Solo API token per user after validating it. The listed tools are read-only, but meta tools can start a paid subscription through a Stripe Checkout link or cancel it; the free plan allows 50 tool calls per month, Pro is $9/month or $90/year with a 10,000-call fair-use limit, and cancellation gives no refund for the current period. Invoice data, including IBAN, is passed to the hosted service.

Installation

In SourceWeft

  1. Open Solo MCP by usefulapi in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.usefulapi%2Fsolo/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "solo-by-usefulapi": {
      "type": "http",
      "url": "https://solo.usefulapi.io/mcp"
    }
  }
}

README

Solo MCP by usefulapi

Use your Solo account from Claude, Cursor, or any MCP client. Read invoices, offers, payment status and the product catalog. Hosted, no local install: connect with your own credentials.

Live endpoint: https://solo.usefulapi.io/mcp · Homepage: https://usefulapi.io

Connect

  • Claude (claude.ai, Desktop): open Customize → Connectors, click + Add → Add custom connector, and paste https://solo.usefulapi.io/mcp.
  • Claude Code: claude mcp add --transport http solo https://solo.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:
json
{  "mcpServers": {    "solo": {      "url": "https://solo.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 Solo credentials.

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

On first connect you provide your Solo API token (Solo → Postavke / Settings → API token). The server validates it and stores it per user. No keys go in config files.

Tools

ToolTypeWhat it does
solo_list_invoicesreadList invoices
solo_get_invoicereadGet invoice
solo_get_invoice_statusreadGet invoice status
solo_list_offersreadList offers
solo_get_offerreadGet offer
solo_get_offer_statusreadGet offer status
solo_list_catalogreadList catalog
solo_usage_statusmetaUsage status (free-tier meter)
solo_request_featuremetaRequest a missing feature
solo_upgrademetaUpgrade to Pro or Pro+
solo_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 user)$9/mo or $90/yr (2 months free)Unlimited*

*Pro has a fair use limit of 10,000 tool calls a month on this server. For more, write to [email protected].

Pro covers this server only. Subscribe with solo_upgrade (it returns a Stripe Checkout link). Cancel any time with solo_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running solo_upgrade before then undoes the cancel. Or write to [email protected].

License

MIT — see LICENSE. Documentation only; the server is hosted.

Source: servers/solo/README.md at commit 4046075

Tools

7

solo_list_invoices

List invoices

List the last 1000 invoices (račun) of the Solo account: id, number, date, gross total, status and status colour. Use solo_get_invoice with an id for full details. Solo API: GET /racun.

Parameterspage

solo_get_invoice

Get invoice

Get one invoice with buyer, line items, taxes, totals, payment method, dates, IBAN, currency and a PDF link. The id is the long hash from solo_list_invoices. Solo API: GET /racun?id=.

Parametersinvoice_idrequired

solo_get_invoice_status

Get invoice status

Get the payment status of one invoice: status code, colour and the payment date (datum_uplate, empty if unpaid). Solo API: GET /status?id=.

Parametersinvoice_idrequired

solo_list_offers

List offers

List the last 1000 offers (ponuda) of the Solo account: id, number, date, gross total, status. Use solo_get_offer for full details. Solo API: GET /ponuda.

Parameterspage

solo_get_offer

Get offer

Get one offer with buyer, line items, taxes, totals, dates, currency and a PDF link. The id is the long hash from solo_list_offers. Solo API: GET /ponuda?id=.

Parametersoffer_idrequired

solo_get_offer_status

Get offer status

Get the status code and colour of one offer. Solo API: GET /status?id=.

Parametersoffer_idrequired

solo_list_catalog

List catalog

List the products and services in the Solo catalog: code (sifra), KPD code, description, unit, quantity, price, discount and tax rate. Solo API: GET /katalog.

Takes no parameters.

Version history

8
  1. v1.5.4LatestNov 7, 2026
  2. v1.4.3Nov 5, 2026
  3. v1.4.2Nov 5, 2026
  4. v1.4.1Nov 4, 2026
  5. v1.4.0Nov 3, 2026
  6. v1.3.1Nov 3, 2026
  7. v1.2.0Nov 1, 2026
  8. v1.0.0Oct 31, 2026

Score

100% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts

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