usefulapiService Fusion MCP server
Read Service Fusion customers, jobs, estimates, invoices and schedule; create customers and jobs. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
What can I ask?
Turn on the Service Fusion connector, then ask in plain words. The AI picks the tools.
- Which jobs are scheduled for tomorrow and who is assigned to each?
- Show the unpaid invoices from the last 30 days.
- When is an HVAC technician free this week for a 2-hour visit?
- Create a customer called Acme Plumbing with a primary contact and a service address.
What you can do with Service Fusion in Claude and ChatGPT
For field-service businesses such as HVAC and plumbing firms who run jobs and technicians in Service Fusion.
See which jobs are scheduled and who is assigned
The AI lists jobs filtered by status, customer or dates, opens one with its technicians and visits, and lists calendar tasks for a day.
Find an open technician slot
The AI reads open time slots for technicians or crews over up to 8 days, filtered by technician, crew or department.
Check which invoices are unpaid
The AI lists invoices with number, total, paid flag, dates and customer, sorted by date, and opens single ones.
Review a customer and their equipment
The AI finds a customer by name, phone, email or address, reads contacts and locations, and lists the equipment on file with make, model and warranty dates.
Review estimates you sent
The AI lists estimates (quotes) by status, customer or dates and opens one with its line items.
Create a customer, job or estimate
The AI creates a customer with contacts and service locations, a job (work order) or an estimate, using your job categories.
Changes dataHow do I connect Service Fusion?
Before you connect
The login page asks for your Client ID and Client Secret.
In Service Fusion open Admin → Developer Settings → API Credentials (OAuth Consumer) and copy the Client ID and Client Secret. API access is included with the PRO plan; on other plans ask Service Fusion support to enable it. The credentials act with your user's permissions and are used only to call the Service Fusion API on your behalf.
Claude claude.ai · Desktop
- Open Customize → Connectors, then click + Add → Add custom connector.
- Enter the name Service Fusion and this URL, then click Add:https://
service-fusion. usefulapi. io/ mcp - Claude opens the login page: enter your Client ID and Client Secret.
- In a chat, click + → Connectors and turn on Service Fusion.
Team and Enterprise: an Owner adds the connector for the organization first.
ChatGPT chatgpt.com
- Open Plugins, click +, then Add custom MCP server.
- Enter the name Service Fusion and this URL, choose OAuth as the authentication, confirm the warning and create it:https://
service-fusion. usefulapi. io/ mcp - ChatGPT opens the login page: enter your Client ID and Client Secret.
- In Plugins, install Service Fusion, then choose it in a chat.
No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.
Claude Code
Run this command, then run /mcp in Claude Code to log in:
Cursor
Add to Cursor or add this to ~/.cursor/mcp.json:
{
"mcpServers": {
"service-fusion": {
"url": "https://service-fusion.usefulapi.io/mcp"
}
}
} VS Code
Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"service-fusion": {
"type": "http",
"url": "https://service-fusion.usefulapi.io/mcp"
}
}
} Codex
Run these commands. The second one opens the login page:
Other clients
Windsurf, Cline, Zed and other MCP clients: add this URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser.
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: the login page asks for your Client ID and Client Secret. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
Pricing
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 50 tool calls / month |
| Proper user | $9/mo · $90/yr | 10,000 tool calls / month |
| Pro+per user | $39/mo · $390/yr | 100,000 tool calls / month |
Each paid plan covers this Service Fusion server only. Ask your AI to run servicefusion_upgrade and choose Pro or Pro+, billed monthly or yearly (it returns a Stripe Checkout link). If you already have Pro, ask to change it to Pro+. The change requires your confirmation, keeps your billing interval and charges the price difference for the rest of the period immediately. Cancel any time with servicefusion_cancel_subscription: your paid plan continues to the end of the paid period, with no refund for the current period, and asking to resume the same plan with servicefusion_upgrade before then undoes the cancel. Or write to support@usefulapi.io.
Tools 30
Show all 30 tools (the AI picks them for you)
Read only · 23
- Get current user
servicefusion_get_meThe Service Fusion user the API credentials belong to: id, name and email. Use it to check the connection. - List customers
servicefusion_list_customersList customers (newest id order unless sorted). Filter by name, contact, address, city, postal code, phone, email, tags or last-serviced date. Add expand=contacts,locations,custom_fields to include them. - Get customer
servicefusion_get_customerOne customer by id, optionally with contacts, phones, emails, locations and custom fields. - List customer equipment
servicefusion_list_customer_equipmentList the equipment on file for a customer (type, make, model, serial number, warranty and install dates). - Get customer equipment
servicefusion_get_customer_equipmentOne piece of equipment of a customer. - List jobs
servicefusion_list_jobsList jobs (work orders). Filter by status, number, PO or invoice number, customer, contact, address, phone, email, category, source and start/end/updated/closed dates. Add expand (techs_assigned, services, products, payments, invoices, visits, notes, ...) for detail. - Get job
servicefusion_get_jobOne job by id, optionally with technicians, line items, labor, expenses, payments, invoices, notes, visits and more. - List estimates
servicefusion_list_estimatesList estimates (quotes). Filter by status, number, PO number, customer, contact, address, phone, email, category, source and start/end/requested dates. - Get estimate
servicefusion_get_estimateOne estimate by id, optionally with line items, technicians, notes, tags and more. - List invoices
servicefusion_list_invoicesList invoices with number, total, paid flag, dates and the customer. The API has no invoice filters: sort and page instead (for example sort=-date). - Get invoice
servicefusion_get_invoiceOne invoice by id. - List calendar tasks
servicefusion_list_calendar_tasksList calendar tasks (appointments and to-dos on the schedule) for one day (start_date or end_date alone), a date range (both) and/or given users. A task is returned when it overlaps the range. - Get calendar task
servicefusion_get_calendar_taskOne calendar task by id. - Get technician availability
servicefusion_get_availabilityOpen time slots for technicians and/or crews over up to 8 days (end_date at most 7 days after start_date). Filter by technician, crew, department, experience level and slot length. - List technicians
servicefusion_list_techsList technicians and sales reps (name, contact details, department, title, color, field-worker and sales-rep flags). - Get technician
servicefusion_get_techOne technician by id. - List technician departments
servicefusion_list_tech_departmentsThe technician department names configured in the account (useful for availability filters). - List crews
servicefusion_list_crewsList crews (named groups of technicians), optionally with their members. - Get crew
servicefusion_get_crewOne crew by id, optionally with its technicians. - List job categories
servicefusion_list_job_categoriesThe job category names to use when creating or filtering jobs. - List job statuses
servicefusion_list_job_statusesThe job status names (code, name, custom flag, category) to use when creating or filtering jobs. - List payment types
servicefusion_list_payment_typesThe payment types configured in the account. - List lead sources
servicefusion_list_sourcesThe lead/referral sources (short and long names) to use when creating or filtering jobs and estimates.
Changes data · 3
- Create customer
servicefusion_create_customerWRITE: create a customer in Service Fusion, optionally with contacts (phones, emails) and service locations. It is visible to the whole team and cannot be deleted through this API; creating the same name twice makes two customers, so search with servicefusion_list_customers first. - Create job
servicefusion_create_jobWRITE: create a job (work order) for a customer, optionally with address, category, source, assigned technicians, tasks, notes, products, services and other charges. It appears on the team's schedule and cannot be deleted through this API; creating twice makes two jobs. Look up category, source and status names with the list tools first. - Create estimate
servicefusion_create_estimateWRITE: create an estimate (quote) for a customer, optionally with address, category, source, technicians, tasks, notes, products, services, other charges and tags. It cannot be deleted through this API; creating twice makes two estimates.
Your usefulapi plan · 4
- Usage status (free-tier meter)
servicefusion_usage_statusReport the caller's current usage: the plan, calls used this month, the limit of the plan (the free monthly cap or the Pro fair use limit), remaining, and whether the limit is reached. Read-only; does not count against the meter. - Request a missing feature
servicefusion_request_featureTell usefulapi that the user needs something the Service Fusion tools cannot do yet (a missing tool, field or filter). Call it only when the user asks for something none of the tools can do, and tell the user that you send the request. Do not call it for errors or for normal requests. Do not include personal data, credentials or customer records. Stored with the product name and the client type (for example Claude or Cursor), without the user's account. At most 5 requests per day. Does not count against the meter. - Upgrade to Pro or Pro+
servicefusion_upgradeGet a paid plan for Service Fusion (the free tier caps monthly usage). Pro: 10,000 tool calls a month, for normal use — plan "monthly" ($9/month) or "yearly" ($90/year, 2 months free). Pro+: 100,000 tool calls a month, for automations and heavy use — plan "plus" ($39/month) or "plus_yearly" ($390/year). Without a plan it returns both Pro and Pro+, each with a payment link, for the user to choose; with a plan, one link. An existing Pro subscription changes to Pro+ in place: call without confirm first, as the reply states the exact charge for this account (the price difference for the rest of the period, or in a free Pro trial the full Pro+ price, as the trial ends); then call with confirm: true. Cancel any time: the plan then runs to the end of the paid period, so it also suits a one-time job. A link opens Stripe Checkout in the browser; after payment the account upgrades automatically. Does not count against the meter. - Cancel the Pro subscription
servicefusion_cancel_subscriptionCancel the caller's Service Fusion Pro subscription at the end of the paid period (no refund for the current period; Pro continues until then, then the free tier applies). Requires confirm: true. Run servicefusion_upgrade later to undo the cancel before the period ends. Does not count against the meter.
FAQ
What can I do with Service Fusion in Claude or ChatGPT?
See which jobs are scheduled and who is assigned. Find an open technician slot. Check which invoices are unpaid. Review a customer and their equipment. Review estimates you sent. Create a customer, job or estimate. See what you can do for the details.
Is this an official Service Fusion product?
No. usefulapi is an independent service. It is not affiliated with or endorsed by Service Fusion. The server calls the Service Fusion API with your own Service Fusion access, so it sees only the data that your account can see.
Can I connect Service Fusion to Claude or ChatGPT?
Yes. In Claude, add this server's URL as a custom connector. In ChatGPT, add it as a custom MCP server in Plugins. Then log in once. Cursor, VS Code, Claude Code and Codex work too. See the setup steps.
What do I need to connect?
The login page asks for your Client ID and Client Secret. See Before you connect for where to find them.
Do I put my Service Fusion key or an Authorization header in the client config?
No. 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: the login page asks for your Client ID and Client Secret. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
How do you keep my Service Fusion credentials?
The login stores them encrypted in the authorization grant of your connection. The server uses them to call the Service Fusion API for you and to derive a private account id for usage metering. usefulapi does not show them on any page or in any reply. To stop all access, remove the connector and change or delete these credentials in Service Fusion.
Can the AI change my Service Fusion data?
Yes, if you approve it. 3 of the 26 Service Fusion tools can create or change data. The other 23 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.
What does it cost?
The Free plan gives 50 tool calls / month. Pro costs $9/mo or $90/yr, with 10,000 tool calls / month. Pro+ costs $39/mo or $390/yr, with 100,000 tool calls / month. Each subscription covers this Service Fusion server only. Cancel any time: your paid plan then runs to the end of the paid period. Run servicefusion_usage_status to see how many calls you used.
How do I subscribe or cancel?
Ask the AI to run servicefusion_upgrade and choose Pro or Pro+, billed monthly or yearly: it returns a Stripe Checkout link. If you already have Pro, ask to change it to Pro+. After you confirm, your existing subscription changes in place, keeps its billing interval and charges the price difference for the rest of the period immediately. To cancel, run servicefusion_cancel_subscription. Your paid plan continues to the end of the paid period.
What if a Service Fusion tool that I need is missing?
Tell the AI what you wanted to do. It can send the request with servicefusion_request_feature. We store the text with the server name, the type of AI client and the tool you tried, not with your account, and read every request when we plan new tools. You can send up to 5 requests per day.
Which AI clients can I use?
Any client that supports remote MCP servers (Streamable HTTP) with OAuth login: Claude (web and desktop), Claude Code, ChatGPT, Codex, Cursor, VS Code, Windsurf and others.
This is a Model Context Protocol endpoint — meant to be connected from an AI client, not opened in a browser. An invalid_token response at the URL is the auth gate working as designed; clients authenticate automatically.
Need a tool this server does not have, or a connection to another system? We build custom integrations and MCP servers.