330 production AI-agent services for data, validation, AI, crypto, and x402 pay-per-use.
Listed on
First seen 2 Oct 2026. One server, whatever directories list it: each directory listing keeps its own page and history.
2
Directories
Collected by InvokeRank
3
Tools
From an anonymous probe
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Tools
| Tool | Description | Behaviour |
|---|---|---|
| get_service | Inspect one enabled public SignalHarness service before invoking it. Use an exact service_id returned by list_services. This free, read-only call returns the canonical description, input and output schemas, price, endpoint, and supported payment metadata when available; an unknown or disabled ID returns a normalized not-found error. | Read-only |
| invoke_service | Run exactly one enabled public SignalHarness service with caller-supplied input. Call get_service first and validate input against its input_schema. An unpaid call returns the canonical x402 V2 PAYMENT-REQUIRED challenge plus the equivalent x402 V1 JSON challenge; a client can then retry once with payment in params._meta["x402/payment"]. The server never retries automatically. A paid call may settle the advertised charge and perform external work, then returns service-specific structured JSON or a normalized error. | Changes data |
| list_services | Discover the currently enabled public SignalHarness service catalog before choosing a service. This free, read-only call takes no arguments and returns a compact service array with canonical IDs, descriptions, prices, and supported payment metadata. Results follow the canonical catalog order; compare services by their exact service_id. | Read-only |
| Directory | Listing | Tier | First seen |
|---|---|---|---|
| Official MCP Registry | SignalHarness.ai | - | 2 Oct 2026 |
| Smithery | SignalHarness.ai | - | 2 Oct 2026 |