Concierge MCP for agentic workflows: verified time + drift, uuid, diff, calc, attest, verify.
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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.
Any JSON value to attest
NTP server for the verified timestamp
This tool isn't marked read-only, so it may change something on the server or in an account you connected.
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.
| Argument | Type | Description |
|---|---|---|
| server | string | NTP server for the verified timestamp |
| payload* | any | Any JSON value to attest |
{
"type": "object",
"required": [
"payload"
],
"properties": {
"server": {
"type": "string",
"default": "time.cloudflare.com",
"description": "NTP server for the verified timestamp"
},
"payload": {
"description": "Any JSON value to attest"
}
}
}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.
| Argument | Type | Description |
|---|---|---|
| expression* | string | e.g. "(1500 * 0.23) + 47" |
{
"type": "object",
"required": [
"expression"
],
"properties": {
"expression": {
"type": "string",
"description": "e.g. \"(1500 * 0.23) + 47\""
}
}
}Unified diff between two texts, with added/removed line counts. For reviewing edits, comparing outputs, or validating transformations.
| Argument | Type | Description |
|---|---|---|
| text_a* | string | Original text |
| text_b* | string | Revised text |
| context | integer | Lines of context around each change |
{
"type": "object",
"required": [
"text_a",
"text_b"
],
"properties": {
"text_a": {
"type": "string",
"description": "Original text"
},
"text_b": {
"type": "string",
"description": "Revised text"
},
"context": {
"type": "integer",
"default": 3,
"minimum": 0,
"description": "Lines of context around each change"
}
}
}Generate one or more random UUIDv4 identifiers -- for records, sessions, and IDs created in agent pipelines.
| Argument | Type | Description |
|---|---|---|
| count | integer | How many UUIDs to generate |
{
"type": "object",
"properties": {
"count": {
"type": "integer",
"default": 1,
"maximum": 1000,
"minimum": 1,
"description": "How many UUIDs to generate"
}
}
}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.
| Argument | Type | Description |
|---|---|---|
| server | string | NTP server to query |
| timezone | string | IANA timezone for a 'local' field, e.g. America/New_York. Optional -- the HTTP transport also takes ?tz= in the URL. |
{
"type": "object",
"properties": {
"server": {
"type": "string",
"default": "time.cloudflare.com",
"description": "NTP server to query"
},
"timezone": {
"type": "string",
"description": "IANA timezone for a 'local' field, e.g. America/New_York. Optional -- the HTTP transport also takes ?tz= in the URL."
}
}
}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.
| Argument | Type | Description |
|---|---|---|
| attested* | object | The record returned by attest |
{
"type": "object",
"required": [
"attested"
],
"properties": {
"attested": {
"type": "object",
"description": "The record returned by attest"
}
}
}