MCP connector for Claude
Contract Finder: who buys your work, near you.
Contract Finder shows which government agencies buy what you do in your state or county, which businesses win that work, how much of it goes to small businesses, and how to get in line. Ask in plain words, such as “roofer in Montana” or “janitorial in Denver County, Colorado”. The numbers come from USAspending.gov, the federal government's official spending data, and every answer links back to the USAspending page that shows the same figures.
Connector URL
https://mcp.modernmustardseed.com/contract-finder
Streamable HTTP. No sign-in. Every tool is read-only.
Informational only, not legal or procurement advice. USAspending.gov is not affiliated with Modern Mustard Seed and does not endorse this tool.
Use it in Claude, ChatGPT and Grok
One URL works in all three. No account or key is needed: https://mcp.modernmustardseed.com/contract-finder
Claude
- Open Customize, then Connectors.
- Choose Add custom connector, paste the URL, then Add.
On Team and Enterprise plans, an Owner adds it for the organization first.
Claude Code: claude mcp add --transport http contract-finder https://mcp.modernmustardseed.com/contract-finder
ChatGPT
- On the web, open chatgpt.com/plugins, select the plus button, then Add custom MCP server.
- Name it Contract Finder, paste the URL as the Server URL and choose No authentication.
- Choose I understand and want to continue, then Create as a plugin.
- Install it from your personal plugins, then type @ in a chat and pick it.
In a workspace, its permissions decide who can add a custom server.
Grok
- Open grok.com/connectors, select New Connector, then Custom.
- Paste the URL. No sign-in is needed.
- Grok finds the tools and uses them when a question needs them.
On Grok Business and Enterprise, a team admin adds it first at console.x.ai: Grok Business, Connectors, Add Connector, Other.
Then ask who buys your kind of work near you. The assistant calls the tools when the question needs them.
Try these
- “Which federal agencies hire roofers in Montana, who won that work last year, and how much of it went to small businesses?”
- “Show me the newest federal landscaping contracts in Montana, with who won them and the links.”
- “I run a plumbing company in Idaho with $4.2 million in average annual receipts. Do I count as small for federal contracts, and how do I get started?”
The tools
who_buys
Who buys this work near me
Totals federal contract obligations for a NAICS code or plain trade words (roofer, janitorial, IT services) performed in a state or county, over the last 12 complete months or a federal fiscal year. Returns the top agencies and sub-agencies, the businesses that won the work, the share marked small business, the number of new contracts and contract actions, the median new contract, month by month amounts, a plain one-line read and a USAspending.gov link that reproduces the search.
Inputs: naics_or_trade and state (required); county and fiscal_year (optional).
recent_awards
Recent contract awards
Lists the newest federal contracts signed for a NAICS code or trade in a state or county: the business that won, the agency and office, the amount obligated so far, the signed and start dates, the description, the award id and its USAspending.gov award page.
Inputs: naics_or_trade and state (required); county, days_back (30 to 730, default 365) and limit (1 to 25, default 10) (optional).
size_check
Small business size check
Reads the SBA size standard for a 6-digit NAICS code (average annual receipts or employees) from SBA's Table of Size Standards, effective March 17, 2023 and checked against 13 CFR 121.201, and says whether a business with the receipts or employee count you give counts as small, with any exceptions and footnotes.
Inputs: naics_or_trade (required); average_annual_receipts_usd or average_employees.
getting_started
Getting started with federal contracts
A sourced, step by step guide to winning federal work as a small business: free SAM.gov registration and the UEI, choosing NAICS codes, size standards, the set-aside programs (8(a), HUBZone, WOSB and EDWOSB, SDVOSB through VetCert), free help from APEX Accelerators, subcontracting through SBA SubNet, GSA Schedules and where live bids are posted. Tailored to a trade and state when given.
Inputs: naics_or_trade and state (both optional).
What the numbers mean
- Obligations
- Money an agency committed on a contract action (a new contract, an order or a change) dated in the period. Not payments. A change that takes money back counts as a negative amount, so a total can shrink.
- Near you
- Where the work is performed (place of performance), not where the winning business is based. A roofer from Oklahoma who fixed a roof in Montana counts in Montana.
- Which awards
- Contracts only: definitive contracts, purchase orders, delivery orders and blanket purchase agreement calls (USAspending award types A, B, C and D, the same set as its "All Contracts" filter). The umbrella agreements that orders are placed under (IDVs) are left out; the orders placed under them are counted.
- Small business share
- The amount tagged with USAspending's
small_businessrecipient type, against the amount taggedother_than_small_business. The tag comes from the size status the contracting officer recorded on each contract action, or a small business program flag on it, not from a new check against SBA size standards, and one action can carry both tags. How USAspending sets them is in its public source code. - Typical new contract
- The median amount obligated so far on the contracts first signed in the period: half were smaller, half larger. We read it straight from USAspending's sorted list, so it is exact, not a sample. If more than 10,000 new contracts match, we say so and leave it out.
- Recent months
- The Department of Defense and the U.S. Army Corps of Engineers publish contract data 90 days late (USAspending, Data Quality), so the last three months undercount their work. The answer says so whenever a period reaches that far.
- The USAspending link
- Every who_buys and recent_awards answer carries a usaspending.gov Advanced Search link with the same code, place, period and award types, so anyone can check a number on the official site.
Trades it understands
Type the work the way you would say it. These words map to the NAICS code below; any 2 to 6 digit NAICS code works too, and the answer always says which code it used.
238160Roofing Contractorsroofer, roofers, roofing, roof repair238220Plumbing, Heating, and Air-Conditioning Contractorsplumber, plumbers, plumbing, hvac238210Electrical Contractors and Other Wiring Installation Contractorselectrician, electricians, electrical, electrical contractor238320Painting and Wall Covering Contractorspainter, painters, painting, painting contractor236118Residential Remodelersremodeler, remodelers, remodeling, remodel236115New Single-family Housing Construction (Except For-Sale Builders)home builder, homebuilder, custom homes, new homes236220Commercial and Institutional Building Constructioncommercial builder, commercial construction, general contractor, gc238110Poured Concrete Foundation and Structure Contractorsconcrete, concrete contractor, foundation, foundations238140Masonry Contractorsmason, masonry, brick, bricklayer238130Framing Contractorsframer, framing, framing contractor238350Finish Carpentry Contractorscarpenter, carpentry, finish carpentry, cabinet installation238310Drywall and Insulation Contractorsdrywall, insulation, plaster, plastering238330Flooring Contractorsflooring, floor installer, carpet installation, hardwood floors238340Tile and Terrazzo Contractorstile, tile setter, tiling, terrazzo238170Siding Contractorssiding, siding contractor, gutters238150Glass and Glazing Contractorsglazier, glazing, glass installation, window installation238910Site Preparation Contractorsexcavation, excavating, excavator, site work237310Highway, Street, and Bridge Constructionpaving, asphalt, road construction, road work238990All Other Specialty Trade Contractorsfencing, fence, fence installation, specialty contractor238290Other Building Equipment Contractorselevator, elevators, escalator237110Water and Sewer Line and Related Structures Constructionwater and sewer, sewer line, water line, utility construction561730Landscaping Serviceslandscaper, landscapers, landscaping, lawn care561720Janitorial Servicesjanitorial, janitor, janitors, custodial561790Other Services to Buildings and Dwellingssnow removal, snow plowing, snowplowing, pressure washing561710Exterminating and Pest Control Servicespest control, exterminator, exterminating, termite561740Carpet and Upholstery Cleaning Servicescarpet cleaning, upholstery cleaning, rug cleaning561612Security Guards and Patrol Servicessecurity guard, security guards, security services, guard services561622Locksmithslocksmith, locksmiths562111Solid Waste Collectiontrash, trash hauling, garbage, waste collection562991Septic Tank and Related Servicesseptic, septic pumping, portable toilets, porta potty562910Remediation Servicesremediation, environmental remediation, asbestos, asbestos abatement531311Residential Property Managersproperty management, property manager, property managers561210Facilities Support Servicesfacilities support, facility management, facilities management, base operations541512Computer Systems Design Servicesit services, it support, managed it, managed services provider541511Custom Computer Programming Servicesweb design, website design, web designer, web development541611Administrative Management and General Management Consulting Servicesmanagement consulting, business consulting, management consultant, program management541613Marketing Consulting Servicesmarketing consultant, marketing consulting, digital marketing, marketing agency541810Advertising Agenciesadvertising, advertising agency, ad agency541820Public Relations Agenciespublic relations, pr firm, pr agency, communications firm541430Graphic Design Servicesgraphic design, graphic designer, branding, logo design541922Commercial Photographyphotographer, photography, commercial photography512110Motion Picture and Video Productionvideo production, videographer, film production541330Engineering Servicesengineer, engineers, engineering, engineering firm541310Architectural Servicesarchitect, architects, architecture, architectural541370Surveying and Mapping (except Geophysical) Servicessurveyor, surveying, land surveying, land surveyor541620Environmental Consulting Servicesenvironmental consulting, environmental consultant541410Interior Design Servicesinterior design, interior designer541211Offices of Certified Public Accountantsaccountant, accountants, accounting, cpa541219Other Accounting Servicesbookkeeping, bookkeeper, payroll services, tax preparation541110Offices of Lawyerslawyer, lawyers, attorney, attorneys541930Translation and Interpretation Servicestranslation, translator, interpreting, interpreter611430Professional and Management Development Trainingcorporate training, professional development, management training561320Temporary Help Servicesstaffing, staffing agency, temp agency, temporary staffing561422Telemarketing Bureaus and Other contact Centerscall center, contact center, answering service, telemarketing561492Court Reporting and Stenotype Servicescourt reporting, court reporter, stenography, transcription561920Convention and Trade Show Organizersevent planning, event planner, conference planning, trade show524210Insurance Agencies and Brokeragesinsurance agency, insurance agent, insurance broker531210Offices of Real Estate Agents and Brokersreal estate agent, realtor, real estate broker541940Veterinary Servicesveterinarian, veterinary, vet clinic, animal hospital722320Catererscaterer, caterers, catering, food service484110General Freight Trucking, Localtrucking, trucking company, local trucking, freight hauling484121General Freight Trucking, Long-Distance, Truckloadlong haul trucking, long distance trucking, over the road trucking, otr484210Used Household and Office Goods Movingmover, movers, moving, moving company492110Couriers and Express Delivery Servicescourier, courier service, delivery service, messenger323111Commercial Printing (except Screen and Books)printer, printing, print shop, commercial printing339950Sign Manufacturingsigns, sign shop, sign company, signage532412Construction, Mining and Forestry Machinery and Equipment Rental and Leasingequipment rental, construction equipment rental, heavy equipment rental621210Offices of Dentistsdentist, dentists, dental, dental office621111Offices of Physicians (except Mental Health Specialists)physician, physicians, doctor, doctors621330Offices of Mental Health Practitioners (except Physicians)therapist, therapists, counselor, counseling621340Offices of Physical, Occupational and Speech Therapists and Audiologistsphysical therapy, physical therapist, occupational therapy, speech therapy621310Offices of Chiropractorschiropractor, chiropractic621320Offices of Optometristsoptometrist, optometry, eye doctor621511Medical Laboratoriesmedical lab, medical laboratory, medical labs, lab testing621610Home Health Care Serviceshome health, home health care, home care, in home care621910Ambulance Servicesambulance, ambulance service, medical transport, ems811111General Automotive Repairauto repair, mechanic, auto mechanic, car repair811121Automotive Body, Paint and Interior Repair and Maintenanceauto body, body shop, collision repair811412Appliance Repair and Maintenanceappliance repair811310Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenanceequipment repair, machinery repair, industrial repair, welding repair
Data sources
- USAspending.gov API (api.usaspending.gov, no key required), run by the U.S. Department of the Treasury. We read its advanced search endpoints for totals by month, by awarding agency and sub-agency and by recipient, counts of contract actions and new contracts, and the award list. USAspending data is public. USAspending.gov does not endorse this tool. Each answer carries the date USAspending last loaded data.
- SBA Table of Size Standards, effective March 17, 2023, built into the connector from SBA's published spreadsheet and checked row by row against 13 CFR 121.201 on eCFR as of October 30, 2026 (992 rows). Where the two disagree (NAICS 523160), we use the regulation's figure and size_check says so.
- getting_started cites the official page for every step: SAM.gov, SBA, GSA, the Federal Acquisition Regulation on acquisition.gov, eCFR, the Federal Register and APEX Accelerators. We read each one on November 3, 2026.
- Live bids are not searched here. SAM.gov's Contract Opportunities API requires a key, and we do not scrape it, so getting_started links to SAM.gov Contract Opportunities instead.
Limits
- Answers are cached for 8 hours. Contract data generally reaches USAspending within five days of a contract action, so a few hours of caching changes little. Every answer carries cached and fetched_at so you can tell how fresh it is. An answer with a missing part is kept for only 10 minutes, so asking again fills it in.
- To stay polite to USAspending, we send at most 80 requests a minute from each server instance and 8,000 a day across all users, with no more than 8 open at once for any one question. Saved answers still work when a limit is reached.
- Each tool also has a per-minute limit on each server instance, and who_buys and recent_awards together accept 5,000 calls a day across all users. Over a limit, the tool says so and gives the time to try again.
- Search periods start no earlier than federal fiscal year 2008, the earliest year USAspending search covers. recent_awards looks back 30 to 730 days and returns up to 25 awards.
Troubleshooting
- “We could not match” a trade
- Try one of the trade words above, or the 6-digit code from census.gov/naics.
- No spending found
- Small places and narrow codes often have none in a year. Drop the county, try the 4-digit group (2381 instead of 238160), or ask for an earlier fiscal year. The answer suggests which.
- “USAspending did not answer”
- Its API is sometimes slow on large searches. We retry once before reporting it. Ask again in a minute; parts that did answer are shown.
For reviewers
No account, key or setup is needed. Add the connector URL above, then:
who_buyswith naics_or_traderooferand stateMT.who_buyswith naics_or_trade561720, stateColoradoand fiscal_year2025.recent_awardswith naics_or_tradelandscaping, stateMTand limit5.size_checkwith naics_or_trade238160and average_annual_receipts_usd4200000.getting_startedwith naics_or_tradeplumberand stateID.- Errors: who_buys with state
ZZ, and size_check with naics_or_trade999999, each return a specific message.
Want a person to look at it?
The connector answers on its own. If you would rather talk the results through with a person, leave your details and Sarah or Anthony at Modern Mustard Seed will write back. This form is the only way we hear from you: your conversation with Claude never reaches us, and the connector never asks for your email.
Support and security
Questions, problems and security reports go to sarah@modernmustardseed.com. A machine-readable contact is at /.well-known/security.txt. How we handle data is in the privacy policy.