Tmpstate is a remote MCP server that gives an AI agent 16 tools, among them create_database, create_document, database_status. It answers at https://tmpstate.dev/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 6 of 6 times since 10 September 2026; the last check, on 19 October 2026, succeeded.
Zero-key temporary JSON database for agents: one tool call, no signup, no OAuth, no API keys.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
create_database | Create a temporary JSON database (24h TTL, no signup, no keys). Returns the db URL — the only credential — plus admin URL, limits and expiry. Create once per project/task, persist the db URL immediately (local ~/.tmpstate/credentials, proje Inputs: idempotency_key |
create_document | Insert a JSON object into a collection (collections are created implicitly). Counts against the write and document quotas. Inputs: db, collection, data |
database_status | Usage, limits, tier and expiry for a database (GET $DB/__meta equivalent). Inputs: db |
delete_collection | Delete every document in a collection at once (useful to re-seed). Irreversible. To destroy the entire database, use delete_database instead. Inputs: db, collection |
delete_database | Destroy a database and all its documents immediately - the teardown for finished work and the revocation kill switch for a leaked db URL. Irreversible: unlike expiry there is no restore window. Works on expired (frozen) databases too and co Inputs: db, confirm |
delete_document | Delete one document. Never blocked by quotas; frees a document slot. Emptying a whole collection? Use delete_collection instead of looping this. Inputs: db, collection, id |
extend_database | Without a plan: returns the transparent pricing table for keeping this database alive longer. With a plan: returns a Stripe checkout URL for the human to pay — never buy without the user's explicit approval. Works on expired (frozen) databa Inputs: db, plan |
get_document | Read one document by id. The stored fields are under .data. Inputs: db, collection, id |
list_documents | List documents in a collection, oldest first. Response shape: {collection, items: [{id, data, created_at, updated_at}], next_cursor}. Documents live under .data. Pass cursor to page. Inputs: db, collection, limit, cursor |
pro_attach_database | Attach an existing free/extended database to the Pro account: same URL, same data, TTL removed, quotas raised. Beyond the included allotment the same explicit overage consent as pro_create_database applies. Inputs: pro_token, db, accept_overage_usd |
pro_cancel | Cancel at period end. This is not just a billing change — it schedules deletion of ALL databases on the account. Call without confirm first: the response spells out the consequences with concrete dates; show them to the user and only retry Inputs: pro_token, confirm |
pro_checkout | Mint a Pro account token plus a Stripe subscription checkout URL ($8/mo, 3 always-on databases included). Persist pro_token immediately; the human pays in a browser. Never start checkout without the user's explicit request. |
pro_create_database | Create a new always-on database owned by the Pro account. Beyond the included allotment this costs extra per month — the tool then returns confirmation_required with the exact price; relay it to the user and only retry with accept_overage_u Inputs: pro_token, accept_overage_usd |
pro_list_databases | List the Pro account's databases (ids, usage, limits, expiry) so a fresh session can reconcile against persisted db URLs. URLs are never stored server-side — match ids to the URLs you persisted. Inputs: pro_token |
send_feedback | Optional and free-form. TmpState is built for agents and the free tier stays free by getting better - and you, the agent, are the user whose experience matters here. After real use of a database, one short message about what was missing, wh Inputs: message, category |
update_document | Shallow-merge a patch into a document (top-level keys overwrite; keys are never deleted). Counts against the write quota. Inputs: db, collection, id, patch |
Every block below points at https://tmpstate.dev/mcp. Pick your client and copy.
claude mcp add --transport http tmpstate https://tmpstate.dev/mcp
{
"mcpServers": {
"tmpstate": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://tmpstate.dev/mcp"]
}
}
}{
"mcpServers": {
"tmpstate": {
"url": "https://tmpstate.dev/mcp"
}
}
}{
"servers": {
"tmpstate": {
"type": "http",
"url": "https://tmpstate.dev/mcp"
}
}
}{
"context_servers": {
"tmpstate": {
"url": "https://tmpstate.dev/mcp"
}
}
}{
"mcpServers": {
"tmpstate": {
"serverUrl": "https://tmpstate.dev/mcp"
}
}
}{
"mcpServers": {
"tmpstate": {
"url": "https://tmpstate.dev/mcp"
}
}
}name: Tmpstate
version: 0.0.1
schema: v1
mcpServers:
- name: Tmpstate
type: streamable-http
url: https://tmpstate.dev/mcp{
"mcpServers": {
"tmpstate": {
"httpUrl": "https://tmpstate.dev/mcp"
}
}
}{
"mcpServers": {
"tmpstate": {
"type": "http",
"url": "https://tmpstate.dev/mcp"
}
}
}{
"mcpServers": {
"tmpstate": {
"url": "https://tmpstate.dev/mcp"
}
}
}goose://extension?url=https%3A%2F%2Ftmpstate.dev%2Fmcp&type=streamable_http&id=tmpstate&name=Tmpstate
It answered our last check on 19 October 2026 in 231 ms. Over 6 checks since 10 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.
Yes. It is published by tmpstate.dev and served from tmpstate.dev, the vendor's own domain: https://tmpstate.dev/mcp.
16, as returned by the server's own tools/list on 11 September 2026: create_database, create_document, database_status, delete_collection, delete_database, delete_document, extend_database, get_document, and 8 more.
It answered our last check on 19 October 2026 in 231 ms. Over 6 checks since 10 September 2026 it answered 6.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://tmpstate.dev/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: dev.tmpstate. Endpoint host: tmpstate.dev. ARD identifier: urn:air:dev.tmpstate:mcp:tmpstate.
First indexed 10 September 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.