JOLT for developers and AI assistants

What a machine can do here without asking us

Everything on this site that a person can read, a program can read too, at a fixed address, in a documented shape, with the same numbers. That covers the published prices, a delivered quote for any unit at any ZIP code we serve, the live count of units in the yard, and the link that opens the reservation flow with the choices already made. It also covers the two things AI assistants now look for: a Model Context Protocol server they can call as a tool, and the plain-text files that let a language model read the whole site in one request.

Nothing here needs an account. The API is GET-only, the MCP server is read-only, and the one action that costs money — paying the reservation deposit — still happens on this site, by a person, under the Terms of Service. If you are building an estimating tool, a procurement bot, a comparison site or an assistant that helps a superintendent order a jobsite office, start with the table below and the quote example after it.

Getting a quote

A quote takes one request. Give it a unit key from the catalog, the five-digit ZIP of the job site and, optionally, the term in months, a list of upgrades, a quantity and the day you want it. The response is the same arithmetic the reservation flow runs: rent, the upgrades you asked for, the damage waiver and the environmental fee as a monthly total; the delivery and pickup fees for the ZIP's zone; the reservation deposit; what is due on the first invoice; a projection of the total over the term; the delivery window in the reservation flow's own terms; and the date it was priced on.

curl "https://joltrents.com/api/public/v1/quote?sku=of20_gridfree&zip=81657&months=6&start=2026-10-05"

The response is trimmed here to the fields most integrations use. Every amount is an integer in cents.

{
  "apiVersion": "v1",
  "quotedOn": "2026-09-11",
  "unit": { "key": "of20_gridfree", "name": "20 ft office container — Grid-Free" },
  "zone": { "code": "B", "town": "Vail", "deliveryFeeCents": 55000, "pickupFeeCents": 55000 },
  "termMonths": 6,
  "monthly": { "rentCents": 149500, "damageWaiverCents": 17940, "environmentalFeeCents": 7475, "totalCents": 174915 },
  "depositCents": 75000,
  "dueAtReservationCents": 75000,
  "firstInvoiceCents": 154915,
  "termTotalCents": 1159490,
  "delivery": {
    "mode": "standard",
    "earliestWindowStart": "2026-09-25",
    "latestWindowStart": "2026-10-09",
    "windowStart": "2026-10-05",
    "windowEnd": "2026-10-07",
    "windowLabel": "Oct 5 – Oct 7",
    "schedulable": true,
    "minTermEnd": "2027-04-05",
    "freeCancellationUntil": "2026-09-20",
    "cancellationNote": "Cancel free in writing through 2026-09-20 — more than 14 days before the first day of the window (Rental Agreement §2.2).",
    "note": null
  },
  "reserveUrl": "https://joltrents.com/reserve?sku=of20_gridfree&zip=81657&start=2026-10-05&step=2&utm_source=public-api&utm_medium=api",
  "sourceUrl": "https://joltrents.com/rent/20ft-office-container/grid-free"
}

The parameters, in full:

The reserveUrl in every quote opens the reservation flow with those choices filled in — unit, quantity or footage, upgrades, branding, Express, protection, ZIP and, when it is bookable, the delivery day — so a person lands on the site-details step, the first one that still needs them, instead of starting from an empty cart. Add your own source parameter to the quote request (lowercase letters, digits and hyphens) and it is carried onto that link, which is how a referring tool shows up in our analytics.

Errors

Errors are JSON with a stable machine code, a sentence a person can act on, the HTTP status and, where it applies, the parameter at fault. The same shape comes back for every endpoint and every version.

{
  "error": {
    "code": "unknown_sku",
    "message": "Unknown unit \"of20\". Catalog keys are listed at /api/public/v1/catalog (units[].key).",
    "status": 400,
    "details": { "param": "sku" }
  },
  "apiVersion": "v1",
  "docs": "https://joltrents.com/developers"
}

Codes you will meet: invalid_request for a malformed parameter, invalid_zip for a ZIP that is not five digits, unknown_sku and unknown_upgrade for keys not in the catalog, outside_service_area for a ZIP we do not deliver to, unquotable when the combination cannot be priced, rate_limited with a Retry-After header, and not_found for a path that is not an endpoint.

Checking availability

The availability endpoint returns one row per rentable unit: how many are free, how many exist, a status word, and the earliest standard delivery window a unit can make. It is the same data behind the availability badge on every product page and the day picker in the reservation flow.

curl "https://joltrents.com/api/public/v1/availability"

{
  "apiVersion": "v1",
  "asOf": "2026-09-11T18:04:12.000Z",
  "items": [
    { "sku": "of20_gridfree", "available": 3, "total": 5, "status": "available",
      "leadTime": "2–4 weeks", "nextWindowStart": "2026-09-28", "nextWindowLabel": "week of Sept 28" }
  ]
}

A unit is held only when a reservation deposit is paid, so treat a count as a snapshot. When available is zero the row carries nextAvailableOn, the date the next unit comes back from a job, and the reservation flow will offer windows from that date.

The catalog

The catalog is the whole price list in one document: every unit with its monthly rent, minimum term, deposit and the upgrades it includes or accepts; every upgrade and add-on; the one-time fees; the reservation deposits; the four purchase builds; the lease-to-own plans; and the delivery and pickup fee for each zone with a link to its page. It carries the revision date and the licence, and it changes only when a price revision is published, so cache it. The response sends an ETag; a conditional request with If-None-Match costs a 304 and no body.

curl -i "https://joltrents.com/api/public/v1/catalog" \
  -H 'If-None-Match: "<etag from the last response>"'

The Price Book is the same dataset as a dated download with its revision history, for spreadsheets and for anyone who wants to diff two dates.

The MCP server

Assistants that speak the Model Context Protocol can call JOLT directly. The server runs at the MCP address in the table above over Streamable HTTP, needs no authentication, and exposes four read-only tools. Each tool's description carries the facts an assistant needs to answer well without a second call: the service area, the delivery window, what a deposit is, that prices are before sales tax. Every response includes the page on this site the figure came from, so an assistant can cite it.

1. 1list_catalogEvery unit, upgrade, fee, deposit, purchase price and delivery zone, with the as-of date.
2. 2get_quoteA dated quote for one unit at one ZIP: monthly total, delivery and pickup fees, deposit, first invoice, delivery window.
3. 3check_availabilityLive counts per unit and the earliest standard delivery window each can make.
4. 4start_reservationThe link that opens the reservation flow with the unit, ZIP, upgrades and a bookable first delivery day filled in; the person finishes and pays there.

To connect it, add a remote MCP server with the address and no authentication. In Claude that is Settings, Connectors, Add custom connector; in ChatGPT it is Settings, Connectors with developer mode on; in a desktop client or an agent framework it is a JSON entry like this one.

{
  "mcpServers": {
    "jolt-rents": { "type": "streamable-http", "url": "https://joltrents.com/mcp" }
  }
}

A typical exchange: the assistant calls get_quote with the unit, ZIP and the day wanted, reads back the monthly total, the first invoice and a window the flow can book today, calls check_availability when the person wants to know how many units are left or when the next one comes back, then calls start_reservation and gives the person the link. The person finishes on this site. Submission to the ChatGPT app directory and the Claude connector directory is documented in the server's readme; until it is listed there, the custom-connector route above works today.

Product feeds

Shopping surfaces want products with a fixed price, and JOLT has four: the three 20 ft office builds and the 40 ft office with bathroom, sold outright. They are published three ways from the same rows: as tab-separated product data for Google Merchant Center, as an OpenAI product feed for ChatGPT search, and as an Agentic Commerce Protocol product feed that an ACP-speaking agent can ingest. The price in each file is the cent figure the buy page and its Offer markup print, and the build checks all three against the catalog before the site publishes.

Rentals are not in any feed on purpose. A month-to-month unit with a delivery fee that depends on the ZIP is not a product with one price; it is a quote, and the API and the MCP server produce it. The OpenAI feed is marked search-only, and the ACP feed carries no checkout: a purchase closes on a Bill of Sale with a person on the other end, as the buy pages explain.

llms.txt and the full text

The llms.txt file is a short map of the site for language models: the sections, the pages in each, and the machine addresses on this page. The llms-full.txt file is the full text of every public page — headings, paragraphs, lists and tables, with the page's address and its last-updated date at the top of each entry — so a model can read the whole site in one request without rendering anything. Drafts, account pages, the admin area and the reservation flow are left out of both.

Rate limits, caching, versioning and licence

Base URL

https://joltrents.com/api/public/v1

Authentication

None. Every endpoint is public and read-only; there are no keys to request or rotate.

Rate limit

120 requests per minute per IP address on the API and on the MCP server. Over the limit you receive HTTP 429 with a Retry-After header; the catalog and availability responses are cacheable, so a polite client rarely gets near it.

Caching

Catalog: 300 seconds with an ETag (send If-None-Match and get 304 when nothing changed). Availability: 30 seconds. Quotes: never cached; each one carries the date it was priced on.

Versioning

The version sits in the path (v1) and in every response and error body as apiVersion. Fields are added, not removed or renamed, within a version; a breaking change ships as v2 beside v1 with notice on this page.

CORS

Any origin may call the API from a browser (Access-Control-Allow-Origin: *).

Money

Every amount is an integer in US cents (monthlyCents, deliveryFeeCents, termTotalCents); formatted strings are for display only. Prices are before sales tax.

Licence

Prices and availability data are published under Creative Commons Attribution 4.0 International (CC BY 4.0). Attribution: JOLT Price Book, Jolt Rents (Jolt Construction Rentals LLC), https://joltrents.com/price-book, licensed CC BY 4.0.

Terms

A quote is an offer to rent at the published rate; it becomes a booking only when a person completes the reservation and pays the deposit under the Terms of Service and the Rental Agreement.

Questions

reserve@joltrents.com with the request URL and the apiVersion from the response, or call 970-279-1015, Mon–Fri 7:00am–7:00pm MT.

From a quote to a reservation

The API quotes; a person reserves. Every quote's reserveUrl opens the reservation flow at the site-details step with the unit, ZIP, upgrades, quantity and delivery day already chosen. From there the person enters the site address and contact details, confirms the day against the live truck calendar, reviews the order, signs the Rental Agreement electronically and pays the deposit by card. The deposit holds the unit and is applied to the first invoice; cancelling more than 14 days before the first day of the delivery window refunds it in full. How it works walks through the same steps in order, and the reservation flow is where they happen.

If a quote and a page ever disagree, tell us the request URL and the apiVersion from the response and we will fix the source, not the page: both are generated from the one catalog, so a disagreement is a bug, not a policy.