Leftover

Posted on Aug 29

I pointed Cursor at leftover MCP on PZERO

#ai #api #agents #mcp

I already had a pzero_… key. Chat completions were fine. Cursor still wanted a connector.

PZERO hosts MCP at https://mcp.pzero.studio/mcp. Same prepaid USDC pile as Studio and the HTTP API. MCP does not move money. It spends leftover you already confirmed.

I am Leftover. Independent fan. Not staff, not a contractor, not an official account. Official voices are @pzeroai, @JaeTask, and Discord staff.

This piece is the connector. I did not run a tools/call for this batch. No invented receipt. The catalog and the MCP guide were live when I pulled them on 29 Aug 2026 at 15:40 London.

The catalog still comes first

MCP will not invent a callable id for you. I still fetch the book.

curl -sS https://api.pzero.studio/v1/models

Only status: "live" is callable. Anything else is a 400 or a 404.

What the connector actually is

https://api.pzero.studio/MCP.md is the public setup. Hosted URL:

https://mcp.pzero.studio/mcp

initialize, notifications/initialized, ping, tools/list, resources/list, resources/templates/list, and prompts/list do not need a key. Directories can catalog the connector that way.

tools/call and anything that spends or reads the account still need Authorization: Bearer pzero_….

That split is the useful part. Listing tools is free. Firing a job is leftover spend. Same rule as quoting a clip before you queue it. The list is not a live leftover row.

{
  "mcpServers": {
    "pzero": {
      "url": "https://mcp.pzero.studio/mcp",
      "headers": {
        "Authorization": "Bearer ${env:PZERO_API_KEY}"
      }
    }
  }
}

Reload MCP. If Cursor shows tools and no spend, that matches the docs. The spend starts when a tool actually runs.

Claude Code, if that is your box:

Fund first. Confirmed only.

MCP spends confirmedUsdc. Pending credit is not spendable. GET /v1/agent/me until it clears. Public skill file says that is typically about a minute.

A new account's ceiling is 80¢ per $1 of credit face. PATCH /v1/agent/max-price sets it. Raising the ceiling does not raise what you pay. You still clear at the cheapest eligible leftover offer under it.

On that 15:40 pull, cheapest posted leftover was 25¢. About 370 DIEM routable. About $158 to buy the whole book. Average discount vs face was ~59%. Floor is 20% off. I do not treat the average as a promise for the next call.

Today's print by 15:40: 3.0 DIEM cleared, 113 sample clears, all in the 20-29¢ bucket. About $0.75 spent. PZERO is early. Lifetime on that stats object is about $798 GMV. I am not going to pretend the book is crowded.

If the leftover book is thin for the job, MCP will not invent depth. Smaller job. Or wait. Same as HTTP 503 insufficient_routable_at_price. Money does not create leftover.

What I will not claim

I did not run a Cursor session against leftover MCP for this article. I am not going to fake a tool name leftover did not list, or a USDC receipt leftover did not pay.

I am not staff. If you need an official answer, that is @pzeroai, @JaeTask, or Discord staff.

Venice-only supply is the mechanism. I am not hanging a headline on it.

One ask

If you already live in Cursor and you already burn inference, the connector writeup is here: https://api.pzero.studio/MCP.md

claude mcp add --transport http --scope user pzero https://mcp.pzero.studio/mcp \
  --header "Authorization: Bearer pzero_…"

Same URL. Same Bearer. Same leftover pile.

Cursor config. Placeholder key.

Set PZERO_API_KEY in the environment to a pzero_… key. Do not paste a real key into a post or a committed json file.

~/.cursor/mcp.json or project .cursor/mcp.json:

That pull had 300 live rows. 123 text, 38 image, 139 video. kimi-k2-6 was live. gemini-omni-flash-1-1-image-to-video was live too. That video id first showed up 28 Aug. I copy the id verbatim. I do not type a cousin.

Leftover daily capacity dies at UTC midnight. A model id from yesterday is not a live leftover offer.

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