Receipt — sign an agent's work, verify it offline
MCPB · GGBANK-RECEIPT.MCPB · 2 COMPONENTS
Ed25519 receipts over work artifacts: issue and verify offline, no account, no chain, no network.
Available components
Last scanned (22 hours ago)
Scores higher than 77% of MCPB servers
Category Security
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security13
- No malware scan is available for this kind of package: the supply-chain vendors we use do not cover it. This is a permanent gap in our coverage, not a finding about the package.Unverified
- Known CVEs were checked across the 4 of 4 dependencies we could resolve, so this covers what we could see, not the whole tree.Partial
- Install-script risk not yet assessed.Unverified
- 0 of 4 dependencies flagged as unhealthy. View diagnostics → Pass
Provenance & Transparency45
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 5 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability72
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 178 tokens (~89/item across 2 items; 2 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management20
- Stability observed for 6 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 2 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 2 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
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.
- 4 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.
- 2 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.
- 31 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.
- 29 Oct 26 44
First indexed and scored.
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 4 Nov 2026 · Analysed mcpb/https://github.com/ecstatica/ggbank-receipt/releases/download/v1.0.0/ggbank-receipt.mcpb
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | mcpb |
| Reason | No attestation published |
Background: How many MCP packages publish verified provenance →
Dependencies 4 packages
| Packages resolved | 4 |
|---|---|
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
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 →
issue_receipt ~116
Sign an artifact with an Ed25519 receipt. Returns the receipt JSON: artifact hash, agent, task, amount and a signature anyone can verify offline.
| Name | Type | Req | Description |
|---|---|---|---|
| agent | string | yes | agent identifier, e.g. VOID-9 |
| amount_gg | number | – | amount paid for the work |
| artifact_path | string | yes | path to the delivered file |
| key_path | string | – | optional Ed25519 private key file; a fresh key is used otherwise |
| task | string | yes | task or quest id |
No output schema declared.
No examples provided.
verify_receipt ~62
Verify a receipt offline: signature, every field, and optionally the artifact hash. Returns ok=false with the failing reason when anything has changed.
| Name | Type | Req | Description |
|---|---|---|---|
| artifact_path | string | – | optional file to hash-check |
| receipt | object | yes | the receipt object as issued |
No output schema declared.
No examples provided.
How do I install the Receipt — sign an agent's work, verify it offline MCP server?
Receipt — sign an agent's work, verify it offline ships as an MCPB bundle, a single file you download and open in an MCP host that supports MCPB bundles, such as Claude Desktop. The host reads the launch command from the bundle's own manifest, so there is no command to copy. Before opening it, check the file's SHA-256 matches the one the MCP registry declares for it, 17ac189297b705462caf4af5330810632e791697ceaeba00e26398d1adfc42d8; the commands to do that are on this page. If it does not match, do not open it.
mcpb · ggbank-receipt.mcpb
Download bundleCheck the download matches the SHA-256 the MCP registry declares before you open it. If it does not match, do not open the file.
SHA-256
17ac189297b705462caf4af5330810632e791697ceaeba00e26398d1adfc42d8
macOS / Linux
echo "17ac189297b705462caf4af5330810632e791697ceaeba00e26398d1adfc42d8 ggbank-receipt.mcpb" | shasum -a 256 -c
Windows (PowerShell)
(Get-FileHash -Algorithm SHA256 .\ggbank-receipt.mcpb).Hash -eq "17ac189297b705462caf4af5330810632e791697ceaeba00e26398d1adfc42d8"
Run it in the folder you saved the bundle to, then open the file with an MCPB-capable host such as Claude Desktop.
What is the Receipt — sign an agent's work, verify it offline MCP server?
Receipt — sign an agent's work, verify it offline is an MCP server listed in the public MCP registry as io.github.ecstatica/ggbank-receipt. Ed25519 receipts over work artifacts: issue and verify offline, no account, no chain, no network. This page covers its MCPB bundle (https://github.com/ecstatica/ggbank-receipt/releases/download/v1.0.0/ggbank-receipt.mcpb).
Is the Receipt — sign an agent's work, verify it offline MCP server safe to use?
Receipt — sign an agent's work, verify it offline scores 47 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 Receipt — sign an agent's work, verify it offline MCP server expose?
Receipt — sign an agent's work, verify it offline exposes 2 tools: issue_receipt, verify_receipt. Their descriptions and schemas cost roughly 178 tokens of context every time the server is loaded.
What licence is the Receipt — sign an agent's work, verify it offline MCP server under?
Receipt — sign an agent's work, verify it offline declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.