Probe V0

Working · 1.3 s

io.github.lexbritten/probev0.1.0

Experimental MCP server for current empirical verification of explicit public HTTPS endpoint claims.

Web Search

Source Registry entry

Maintain this server? Claim it

Try it

Call this server's tools from your browser. Nothing to install.

https://probe-evidence.probe-lab.workers.dev/mcp

Requests go through mcptry because browsers can't call most MCP servers directly. Header values are sent to the server for that request only and are never stored or logged.

Tool list from our last check. Connect live to refresh it.

probe.history Read-only

Retrieve up to 20 persisted observations for an existing Probe experiment ID without making a new HTTP request. Use after verify_http_claim to inspect repeated results, PASS/FAIL/ERROR counts, agreement, or whether the observed verdict changed between the two latest decisive observations. This is historical evidence lookup, not a current live verification; use verify_http_claim when freshness or present endpoint behavior matters.

probe_idstring, required

The 64-character lowercase hexadecimal Probe experiment ID returned by verify_http_claim.

limitinteger

Maximum number of newest stored observations to return, from 1 through 20.

Tools (2)

probe.history

read-only

Argument	Type	Description
limit	integer	Maximum number of newest stored observations to return, from 1 through 20.
probe_id*	string	The 64-character lowercase hexadecimal Probe experiment ID returned by verify_http_claim.

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "probe_id"
  ],
  "properties": {
    "limit": {
      "type": "integer",
      "default": 10,
      "maximum": 20,
      "minimum": 1,
      "description": "Maximum number of newest stored observations to return, from 1 through 20."
    },
    "probe_id": {
      "type": "string",
      "pattern": "^[a-f0-9]{64}$",
      "description": "The 64-character lowercase hexadecimal Probe experiment ID returned by verify_http_claim."
    }
  }
}

verify_http_claim

Use this to verify a current public HTTPS claim by direct observation rather than web search, documentation, browser inference, or shell/curl. Use for explicit assertions that a GET/HEAD currently returns an expected HTTP status, exact header value, JSON value at a JSON Pointer, or body substring. It evaluates assertions, persists bounded evidence, reuses sufficiently fresh matching evidence, and summarizes recent observations. follow_redirects defaults to false; when true, Probe manually follows at most 3 validated HTTPS redirects. Every fetch uses redirect: manual. V0 supports only public HTTPS URLs without credentials, query strings, fragments, IP literals, or non-443 ports. Redirect validation is hostname/policy based; the Worker cannot guarantee protection against DNS rebinding between validation and platform DNS resolution.

read-only

Argument	Type	Description
url*	string	Public HTTPS URL to observe. V0 forbids credentials, query strings, fragments, IP literals, private or local destinations, and non-443 ports.
method	string	HTTP method to observe. Use HEAD only when response headers and status are sufficient.
assertions*	array	One to eight explicit assertions evaluated against the same HTTP response.
follow_redirects	boolean	Whether to follow up to three validated HTTPS redirects. Defaults to false.
freshness_seconds	integer

{ "type": "object", "$schema": "https://json-schema.org/draft/2020-12/schema", "required": [ "url", "assertions" ], "properties": { "url": { "type": "string", "format": "uri", "description": "Public HTTPS URL to observe. V0 forbids credentials, query strings, fragments, IP literals, private or local destinations, and non-443 ports." }, "method": { "enum": [ "GET", "HEAD" ], "type": "string", "default": "GET", "description": "HTTP method to observe. Use HEAD only when response headers and status are sufficient." }, "assertions": { "type": "array", "items": { "oneOf": [ { "type": "object", "required": [ "kind", "expected" ], "properties": { "kind": { "type": "string", "const": "status", "description": "Assert the HTTP response status code." }, "expected": { "type": "integer", "maximum": 599, "minimum": 100, "description": "Expected HTTP status code from 100 through 599." } } }, { "type": "object", "required": [ "kind", "key", "expected" ], "properties": { "key": { "type": "string", "maxLength": 80, "minLength": 1, "description": "Response header name to compare case-insensitively." }, "kind": { "type": "string", "const": "header_equals", "description": "Assert an exact response header value." }, "expected": { "type": "string", "maxLength": 1024, "description": "Exact expected response header value." } } }, { "type": "object", "required": [ "kind", "key", "expected" ], "properties": { "key": { "type": "string", "maxLength": 256, "minLength": 1, "description": "JSON Pointer identifying the response value to compare, for example /status." }, "kind": { "type": "string", "const": "json_equals", "description": "Assert an exact JSON value at a JSON Pointer." }, "expected": { "description": "Exact JSON value expected at the JSON Pointer." } } }, { "type": "object", "required": [ "kind", "expected" ], "properties": { "kind": { "type": "string", "const": "body_contains", "description": "Assert that the response body contains a literal substring." }, "expected": { "type": "string", "maxLength": 256, "minLength": 1, "description": "Literal case-sensitive substring expected in the bounded response body." } } } ] }, "maxItems": 8, "minItems": 1, "description": "One to eight explicit assertions evaluated against the same HTTP response." }, "follow_redirects": { "type": "boolean", "default": false, "description": "Whether to follow up to three validated HTTPS redirects. Defaults to false." }, "freshness_seconds": { "type": "integer", "default": 300, "maximum": 86400, "minimum": 300, "description": "Maximum acceptable age of reusable matching evidence, in seconds. Public Probe V0 requires exactly 300." } } }