"Have I Been Pwned" matching MCP connectors:

GXEON services, prepaid packs from R$0.99, purchase planning, and agent buyer guidance.

Free MCP, API auth, webhook and schema diagnostics with bounded checks and safe quote routing.

Discover SEC facts, CSV and citation checks, web extraction, and email-domain mail checks.

X-Correlation-Id charset, value discarded

application/x-www-form-urlencoded plus count, input discarded

Whether an HTTP status is retryable

POST is allowed on MCP

If-Unmodified-Since HTTP-date, value discarded

If-Match etag list count, value discarded

Whether a token is an HTTP method

If-None-Match star-or-etag, value discarded

GET is allowed

always-seven MCP — wraps StupidAPIs (keyless — no credential needed)

ship-on-friday MCP — wraps StupidAPIs (keyless — no credential needed)

passive-aggression MCP — wraps StupidAPIs (keyless — no credential needed)

JSON Schema validation MCP.

chaos-index MCP — wraps StupidAPIs (keyless — no credential needed)

schrodingers-boolean MCP — wraps StupidAPIs (keyless — no credential needed)

npm MCP — wraps the npm Registry API (free, no auth)

JSONPlaceholder MCP — wraps JSONPlaceholder fake REST API (free, no auth)