Use Tensorust from your code or your agent.

Try it now

Search everything we publish. This calls the live API from your browser.

Connect an agent (MCP)

Add the server once and your agent can look up crates, price models, read The Manual and run our tools in the middle of a task.

claude mcp add --transport http tensorust https://mcp.tensorust.com/mcp

{
  "mcpServers": {
    "tensorust": {
      "type": "http",
      "url": "https://mcp.tensorust.com/mcp"
    }
  }
}

code --add-mcp '{"name":"tensorust","type":"http","url":"https://mcp.tensorust.com/mcp"}'

npx @modelcontextprotocol/inspector
# Transport: Streamable HTTP, URL: https://mcp.tensorust.com/mcp

Call the REST API

Cheapest model for a chatbot at 100,000 replies a month

curl "https://api.tensorust.com/v1/llm/cheapest?job=chat&requests=100000&limit=3"

import requests

r = requests.get("https://api.tensorust.com/v1/llm/cheapest",
                 params={"job": "chat", "requests": 100000, "limit": 3})
for m in r.json()["models"]:
    print(m["name"], m["monthly_usd"])

const r = await fetch("https://api.tensorust.com/v1/llm/cheapest?job=chat&requests=100000&limit=3");
const { models } = await r.json();
console.table(models.map(m => ({ name: m.name, monthly: m.monthly_usd })));

Which crate do people really use? Compare real downloads

curl "https://api.tensorust.com/v1/crates/compare?names=serde,tokio,anyhow"

import requests

r = requests.get("https://api.tensorust.com/v1/crates/compare", params={"names": "serde,tokio,anyhow"})
for c in r.json()["crates"]:
    print(c["name"], c["real_downloads_per_day"], c["release_window_share_pct"])

const r = await fetch("https://api.tensorust.com/v1/crates/compare?names=serde,tokio,anyhow");
const { crates, verdict } = await r.json();
console.log(verdict);

Run a tool: cron in plain English with the next runs

curl -X POST "https://api.tensorust.com/v1/tools/cron_explain" \
  -H "content-type: application/json" \
  -d '{"expression": "*/15 9-17 * * 1-5", "timezone": "America/New_York"}'

import requests

r = requests.post("https://api.tensorust.com/v1/tools/cron_explain",
                  json={"expression": "*/15 9-17 * * 1-5", "timezone": "America/New_York"})
print(r.json()["english"])

const r = await fetch("https://api.tensorust.com/v1/tools/cron_explain", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({ expression: "*/15 9-17 * * 1-5", timezone: "America/New_York" }),
});
console.log((await r.json()).english);

Full spec: OpenAPI 3.1 (also at /developers/openapi.json). Import it into Postman, Insomnia or a GPT action.

Bulk data (static JSON)

Every file is rebuilt with the site and cached on the CDN. Use these when you want everything at once; there is no rate limit. Start at /data/v1/index.json.

• /data/v1/crates.json: Every tracked Rust crate with real (quiet-day) downloads
• /data/v1/crates/{name}.json: One crate: 90 daily numbers, releases, peak
• /data/v1/llm/models.json: Every priced LLM API model with 6 workload costs
• /data/v1/llm/models/{slug}.json: One model with price history
• /data/v1/llm/changes.json: Dated LLM API price changes + announced ones
• /data/v1/manual.json: The Manual: explainers and guides index
• /data/v1/manual/{slug}.json: One Manual page: short answer, key facts, sources, FAQ
• /data/v1/articles.json: Every article
• /data/v1/reports.json: Report series and issues with CSV links
• /data/v1/money.json: Money-in-cash pages, constants, US debt
• /data/v1/tools.json: Free tools and which ones the API can run
• /data/v1/tools/vram.json: LLM VRAM calculator data
• /data/v1/search.json: Unified search index of everything above

What's free, and limits

• Everything is free today. No key, no account. Reading, searching and every tool.
• Rate limit: 60 requests a minute per IP on the API, and 60 tool calls a minute on the MCP server (connecting and listing tools are not counted). Over that you get HTTP 429 with a Retry-After header. Need more? Use the static JSON, or email matt@tensorust.com.
• Later, heavy calls may cost a few cents through HTTP 402 (x402, USDC on Base): agents pay per call with no account. Nothing charges today, and anything free now stays free.
• Credit: data is CC BY 4.0. Link the page the number came from (every record has a url).
• Receipts: every price and number carries its source and the date we checked it. If one is wrong, tell us and we fix it.

Coming next

The Floor (posts and receipts) and Agent Builds will get the same two front doors: agents with their own keys, owned by a person, labelled as agents. The MCP server already lists those tools and says plainly that they are not live yet.

Also here for machines: llms.txt, llms-full.txt, /.well-known/mcp.json, ai-plugin.json.