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PriorSeal MCP Server

answering

PriorSeal is answering right now. Last checked 13 min ago. It exposes 12 tools. Last commit 24 Oct 2026.

Bounded authorization and independently verifiable execution evidence for agents.

Uptime history 8 days of history · worst day 95%
8 days agonow
100.0%
Uptime 24h
91 of 91 checks
12
Tools
read from the server
767 ms
Response time
average over 24h
6
Stars
last commit 24 Oct 2026

What changed 31

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 19 October 2026. No other catalogue keeps this.

24 Oct a tool changed version5 times that day
23 Oct a tool changed version5 times that day
23 Oct 2 tools appeared priorseal_get_evidence, priorseal_get_fresh_evidence_check
23 Oct 2 tool descriptions were rewritten priorseal_get_evidence, priorseal_get_evidence_bundle
22 Oct a tool changed version4 times that day
21 Oct a tool changed version4 times that day
20 Oct a tool changed version4 times that day
19 Oct a tool changed version5 times that day
and 21 more, back to 19 October 2026

What the code does

We read the source, 2 h ago · tools taken from the live server · rules 995398eba69f

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

    der: 'MIIDtzCCAp+gAwIBAgIQDOfg5RfYRv6P5WD8G/AwOTANBgkqhkiG9w0BAQUFADBlMQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3d3cuZGlnaWNlcnQuY29tMSQwIgYDVQQDExtEaWdpQ2VydCBBc3N1cmVkIElEIFJvb3QgQ0EwHhcNMDYxMTEwMDAwMDAwWhcNMzExMTEwMDAwMDAwWjBlMQswCQYDVQQGEwJVUzEVMBMGA1…

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 13 min ago.

run in your terminal
claude mcp add priorseal --transport http https://priorseal.xyz/mcp
Settings → Connectors → Add custom connector, then paste this address
https://priorseal.xyz/mcp
~/.codex/config.toml
[mcp_servers.priorseal]
url = "https://priorseal.xyz/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "priorseal": {
      "url": "https://priorseal.xyz/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "priorseal": {
      "type": "http",
      "url": "https://priorseal.xyz/mcp"
    }
  }
}

Available tools 12

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

priorseal
priorseal_accept_authorization
Verify and persist a principal-signed authorization. This can consume configured Agent credits and changes service state; send an idempotency key. It never signs, submits, or executes a transaction.
priorseal_get_authorization
Read an accepted authorization by its identifier.
priorseal_get_capabilities
Read the live PriorSeal deployment capabilities before constructing a workflow.
priorseal_get_evidence
Get a free x402 purchase handoff for the chain-neutral Evidence API envelope. This MCP result never includes the paid envelope itself.
priorseal_get_evidence_bundle
Get a free x402 purchase handoff for the portable receipt evidence bundle. This MCP result never includes the paid bundle itself.
priorseal_get_fresh_evidence_check
Get a free x402 purchase handoff for a newly signed, read-only chain re-observation of an authorization-bound receipt.
priorseal_get_observation_job
Read the durable status of an automatic finality-observation job.
priorseal_get_receipt
Read a signed execution receipt by its identifier.
priorseal_observe_execution
Persist an observation request for an already-submitted EVM or Solana transaction, then issue evidence when configured observation completes. This can consume configured Agent credits; send an idempotency key. It never broadcasts a transaction.
priorseal_prepare_authorization
Canonicalize a bounded authorization and return the exact EIP-712 typed data or Solana message for a human-controlled principal to sign. This is read-only and never signs, submits, or executes a transaction.
priorseal_prepare_controlled_execution
Prepare a bounded authorization together with the deployment capabilities and a safe, explicit handoff plan. A human-controlled principal must still sign; this never accepts an authorization, signs, submits, or executes a transaction.
priorseal_verify_receipt
Convenience-verify a PriorSeal receipt with the deployment key registry. Independent local verification remains required for trust decisions.

Endpoints

URLTransportStateLatencyChecked
https://priorseal.xyz/mcp streamable-http answering 609 ms 13 min ago

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PriorSeal — questions

Answers built from our own checks of this server.

What can PriorSeal do?
It exposes 12 tools, read directly from the server on our last check. Among them: priorseal_accept_authorization, priorseal_get_authorization, priorseal_get_capabilities, priorseal_get_evidence, priorseal_get_evidence_bundle, priorseal_get_fresh_evidence_check and 6 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is PriorSeal working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 767 ms. The bar chart above shows every period we have measured.
How do I connect PriorSeal?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does PriorSeal need an API key?
No. PriorSeal completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 12 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is PriorSeal?
It answers our handshake in 767 ms on average, which is faster than 13% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is PriorSeal open source?
The code is open source: it is published under the MIT licence, written in TypeScript, 6 stars on GitHub and 2 open issues. The licence covers the code in the repository, not the hosted service at priorseal.xyz, which runs on its operator's own terms.