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dev.tmpstate/tmpstate

REMOTE · TMPSTATE.DEV · SCANNED SEP 22

Zero-key temporary JSON database for agents: one tool call, no signup, no OAuth, no API keys.

Available components

0 this week 80 Trust /100
Trust breakdown (7 categories)

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →

Endpoint Security63
Transport & Reachability100
Schema Quality & AI Usability81
  • AI-judged instruction clarity (excellent).Pass
  • Context-footprint check failed: tool/resource definitions use about 1754 tokens (~109/item across 16 items; 16 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
  • Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
  • No destabilizing schema changes in the last 30 days.Pass
Tool Coverage97
  • 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
  • 91% of tool parameters carry a description.Partial
Tool Safety75
  • No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
  • 0 of 4 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "delete_document" implies "delete" and declares no destructiveHint at all, which the MCP spec reads as destructive by default. See how to fix → Fail
  • An AI judge read all 17 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
  • Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Install

How do I install the dev.tmpstate/tmpstate MCP server?

dev.tmpstate/tmpstate is a hosted endpoint at https://tmpstate.dev/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

remote · tmpstate.dev

# add to Claude Code
claude mcp add --transport http dev-tmpstate-tmpstate 'https://tmpstate.dev/mcp'
// .cursor/mcp.json
{
  "mcpServers": {
    "dev-tmpstate-tmpstate": {
      "url": "https://tmpstate.dev/mcp"
    }
  }
}
// .vscode/mcp.json
{
  "servers": {
    "dev-tmpstate-tmpstate": {
      "type": "http",
      "url": "https://tmpstate.dev/mcp"
    }
  }
}
# ~/.codex/config.toml
[mcp_servers.dev-tmpstate-tmpstate]
url = "https://tmpstate.dev/mcp"
// opencode.json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "dev-tmpstate-tmpstate": {
      "type": "remote",
      "url": "https://tmpstate.dev/mcp",
      "enabled": true
    }
  }
}
# add to OpenClaw
openclaw mcp add dev-tmpstate-tmpstate --url 'https://tmpstate.dev/mcp' --transport streamable-http
# ~/.hermes/config.yaml
mcp_servers:
  dev-tmpstate-tmpstate:
    url: "https://tmpstate.dev/mcp"
// ~/.netclaw/config/netclaw.json
{
  "McpServers": {
    "dev-tmpstate-tmpstate": {
      "Transport": "http",
      "Url": "https://tmpstate.dev/mcp"
    }
  }
}
# add to Vellum
assistant mcp add dev-tmpstate-tmpstate -t streamable-http -u 'https://tmpstate.dev/mcp'
// mcp.json
{
  "mcpServers": {
    "dev-tmpstate-tmpstate": {
      "type": "http",
      "url": "https://tmpstate.dev/mcp"
    }
  }
}

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

Changelog

Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.

  • 26 Aug 26 −1
    • We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
  • 25 Aug 26 0
    • Stability: 0.97 → pass security
  • 11 Aug 26 0
    • We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
  • 31 Jul 26 0
    • We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
  • 30 Jul 26 0
    • We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
  • 27 Jul 26 0
    • We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
  • 26 Jul 26 0

    First indexed and scored.

Diagnostics

Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.

Captured 22 Sept 2026 · Probed https://tmpstate.dev/mcp

TLS valid

Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .

Subject Issuer Valid from Valid until Key Signature Serial
CN=*.tmpstate.dev CN=YR2,O=Let's Encrypt,C=US 3 Sept 2026 2 Dec 2026 RSA 2048 SHA256-RSA 65076f0a895d62817be3c600db9f1793062
SANs: *.tmpstate.dev, tmpstate.dev
CN=YR2,O=Let's Encrypt,C=US (CA) CN=Root YR,O=ISRG,C=US 3 Sept 2025 2 Sept 2028 RSA 2048 SHA256-RSA 4ebd24947e24d394802d84a52fd5b319
CN=Root YR,O=ISRG,C=US (CA) CN=ISRG Root X1,O=Internet Security Research Group,C=US 13 May 2026 2 Sept 2032 RSA 4096 SHA256-RSA f24b6d17f9d9ad7cb1c9fea78782699f

Background: What to check on a remote MCP endpoint →

DNSSEC insecure

Validation of tmpstate.dev. Not signed

Zone DS Keys Algorithms Outcome
. trust_anchor 20326, 38696 8, 8 Verified
dev. present 60074 8 Verified
tmpstate.dev. absent Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation
Authentication No authorisation required

The endpoint answered without asking for a token. Anyone who knows the URL can reach it.

Result No authorisation required
HTTP status 200
Header Value
strict-transport-security max-age=63072000

Background: How OAuth 2.1 works in the 2026 MCP spec →

Transports 2 probes
Transport URL Outcome Status Location
streamable-http https://tmpstate.dev/mcp Verified 200
http (plaintext) http://tmpstate.dev/mcp HTTPS enforced 308 https://tmpstate.dev/mcp
MCP tools · 16 exposed · ~1,571 tokens

The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →

Tool Tokens
create_database ~121

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, project README, and your memory), and reuse it instead of creating again. For retries or parallel workers, pass a stable idempotency_key so duplicate calls return the same database.

NameTypeReqDescription
idempotency_keystringStable retry key. Reusing it from the same client returns the same database.

No output schema declared.

No examples provided.

create_document ~78

Insert a JSON object into a collection (collections are created implicitly). Counts against the write and document quotas.

NameTypeReqDescription
collectionstringyesCollection name (created implicitly on first write).
dataobjectyesThe document: a JSON object.
dbstringyesThe database URL returned at creation (or its bare s-... capability).

No output schema declared.

No examples provided.

database_status ~47

Usage, limits, tier and expiry for a database (GET $DB/__meta equivalent).

NameTypeReqDescription
dbstringyesThe database URL returned at creation (or its bare s-... capability).

No output schema declared.

No examples provided.

delete_collection ~75

Delete every document in a collection at once (useful to re-seed). Irreversible. To destroy the entire database, use delete_database instead.

NameTypeReqDescription
collectionstringyesCollection name (created implicitly on first write).
dbstringyesThe database URL returned at creation (or its bare s-... capability).

No output schema declared.

No examples provided.

delete_database ~146

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 consumes no quota. Call without confirm first: the response states the consequences; show them to the user and only retry with confirm="true" after their explicit approval. Afterwards remove the db URL from wherever you persisted it.

NameTypeReqDescription
confirmstringPass "true" only after the user has seen that deletion is immediate and irreversible and approved.
dbstringyesThe database URL returned at creation (or its bare s-... capability).

No output schema declared.

No examples provided.

delete_document ~85

Delete one document. Never blocked by quotas; frees a document slot. Emptying a whole collection? Use delete_collection instead of looping this.

NameTypeReqDescription
collectionstringyesCollection name (created implicitly on first write).
dbstringyesThe database URL returned at creation (or its bare s-... capability).
idstringyesDocument id (doc_...).

No output schema declared.

No examples provided.

extend_database ~110

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) databases too: paying restores them. After the user says they have paid, call database_status: the new expiry and tier confirm the extension.

NameTypeReqDescription
dbstringyesThe database URL returned at creation (or its bare s-... capability).
planstring

No output schema declared.

No examples provided.

get_document ~71

Read one document by id. The stored fields are under .data.

NameTypeReqDescription
collectionstringyesCollection name (created implicitly on first write).
dbstringyesThe database URL returned at creation (or its bare s-... capability).
idstringyesDocument id (doc_...).

No output schema declared.

No examples provided.

list_documents ~106

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.

NameTypeReqDescription
collectionstringyesCollection name (created implicitly on first write).
cursorstringnext_cursor from the previous page.
dbstringyesThe database URL returned at creation (or its bare s-... capability).
limitinteger

No output schema declared.

No examples provided.

pro_attach_database ~110

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.

NameTypeReqDescription
accept_overage_usdstring
dbstringyesThe database URL returned at creation (or its bare s-... capability).
pro_tokenstringPro account token (pt_...). Optional if the MCP connection already sends Authorization: Bearer pt_...

No output schema declared.

No examples provided.

pro_cancel ~113

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 with confirm="cancel" after their explicit approval.

NameTypeReqDescription
confirmstringPass "cancel" only after the user has seen the consequences and approved.
pro_tokenstringPro account token (pt_...). Optional if the MCP connection already sends Authorization: Bearer pt_...

No output schema declared.

No examples provided.

pro_checkout ~51

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.

Input schema present but exposes no named parameters.

No output schema declared.

No examples provided.

pro_create_database ~119

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_usd after their explicit approval.

NameTypeReqDescription
accept_overage_usdstringExplicit overage consent, e.g. "1.50", only after the user approved.
pro_tokenstringPro account token (pt_...). Optional if the MCP connection already sends Authorization: Bearer pt_...

No output schema declared.

No examples provided.

pro_list_databases ~79

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.

NameTypeReqDescription
pro_tokenstringPro account token (pt_...). Optional if the MCP connection already sends Authorization: Bearer pt_...

No output schema declared.

No examples provided.

send_feedback ~165

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, what feature would have helped, or what felt slow or took extra requests is genuinely useful. This is about your own experience, so no human approval is needed; if your user volunteers feedback too, relay it and say it came from them. Never include database URLs, capabilities, or Pro tokens - capability-shaped strings are redacted server-side.

NameTypeReqDescription
categorystringOptional bucket for triage.
messagestringyesWhat was missing, confusing, or slow - or what worked well. Plain text, one short message.

No output schema declared.

No examples provided.

update_document ~95

Shallow-merge a patch into a document (top-level keys overwrite; keys are never deleted). Counts against the write quota.

NameTypeReqDescription
collectionstringyesCollection name (created implicitly on first write).
dbstringyesThe database URL returned at creation (or its bare s-... capability).
idstringyesDocument id (doc_...).
patchobjectyesTop-level fields to merge.

No output schema declared.

No examples provided.

Common questions

What is the dev.tmpstate/tmpstate MCP server?

dev.tmpstate/tmpstate is an MCP server listed in the public MCP registry as dev.tmpstate/tmpstate. Zero-key temporary JSON database for agents: one tool call, no signup, no OAuth, no API keys. This page covers its hosted endpoint (https://tmpstate.dev/mcp).

Is the dev.tmpstate/tmpstate MCP server safe to use?

dev.tmpstate/tmpstate scores 80 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

What tools does the dev.tmpstate/tmpstate MCP server expose?

dev.tmpstate/tmpstate exposes 16 tools: create_database, database_status, list_documents, get_document, create_document, and 11 more. Their descriptions and schemas cost roughly 1,571 tokens of context every time the server is loaded.

Does the dev.tmpstate/tmpstate MCP server require authentication?

No. We connected to dev.tmpstate/tmpstate without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

Is the dev.tmpstate/tmpstate MCP server still maintained?

dev.tmpstate/tmpstate is still listed as active in the MCP registry. We last reached this channel on 22 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.