Stamp MCP server

• attestFree

  Wrap any payload in a tamper-evident record: a UUID, a timestamp (NTP-verified when reachable, local clock otherwise -- the record says which), and a sha256 over the canonical record. One call, the record is complete and tamper-evident.

• calculateFree

  Evaluate a math expression safely: + - * / // % **, parentheses, functions (abs round min max sqrt floor ceil exp log log2 log10 pow sin cos tan), constants pi e tau inf. Parsed to an AST and only whitelisted nodes are computed -- no eval(), no names, no arbitrary code.

• diffFree

  Unified diff between two texts, with added/removed line counts. For reviewing edits, comparing outputs, or validating transformations.

• generate_uuidFree

  Generate one or more random UUIDv4 identifiers -- for records, sessions, and IDs created in agent pipelines.

• get_timeFree

  Query an NTP server for current UTC time and this clock's offset. Appends the sample to the drift log and returns the trend inline: current offset, drift rate (ms/day), and whether the clock is stable, drifting, or accelerating.

• verifyFree

  Check a record produced by attest: recompute the sha256 over the record and compare. Pass/fail -- did this payload produce this hash at this timestamp. Any modified field breaks it.

• Code scan7 source files scanned20/25
• Live reliabilityremote reachable in 714ms20/20
• Tool poisoning6 tool descriptions checked15/15
• Auth qualityopen endpoint, read-only tools10/15
• Maintenancerepository not readable: repo not found3/15
• Maintainer identityno repository or website to verify2/10

Safety score

70/100

higher than 33% of 48,243 servers

Tools

6

the typical server has 7

Tools that change things

0%

typical: 0%. Fewer write tools means less an agent can break

Uptime

89%

of our recent checks; the typical remote server answers 100%

Response time

352 ms

faster than 46% of 30,027 servers

Downloads a week

52

more than 42% of 12,306 servers with a package

Stamp: common questions

Is Stamp MCP server safe?

Mostly: it is graded B (70/100). Read the Stamp safety report

How do I install Stamp?

It runs remotely at stamp-mcp.terradev.cloud. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.

Does Stamp need an API key?

Not as far as the registry entry and our scan can tell: no credentials are declared or required.

Is Stamp maintained?

The latest release is v0.6.1.

Is Stamp up?

89% of our last 28 checks got an answer. We check remote servers about four times a day.

What can I use instead of Stamp?

Servers from other publishers that do the same job: Agentic Mermaid MCP server.

How does Stamp compare with other MCP servers?

safety score 70/100 (higher than 33% of 48,243 servers); tools 6 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.