x402-gated subnet calculator for IP network intelligence
What it does
This endpoint at netintel-production-440c.up.railway.app/subnet/calc provides a subnet calculation service behind an x402 paywall. Based on the endpoint path and naming conventions, it appears to perform IP subnet calculations — likely accepting CIDR notation or IP/mask inputs and returning network details such as network address, broadcast address, usable host range, and subnet mask conversions.
The endpoint is live and responds with HTTP 402 (Payment Required) on GET requests, confirming it follows the x402 protocol for machine-to-machine payments. However, the 402 challenge body returned is empty, meaning no pricing details (token, amount, network) could be extracted from the probe. No documentation, OpenAPI spec, or README is available on the server — all common paths return 404.
Due to the extremely sparse information available, nearly all details about this endpoint's capabilities, input/output schema, and pricing are inferred from the URL path alone. Users should proceed with caution and expect to discover the API contract through experimentation or by contacting the provider.
Capabilities
Use cases
- —Calculating subnet details (network address, broadcast, host range) from CIDR notation
- —Programmatic subnet planning for network automation tools
- —Agent-driven network intelligence lookups behind micropayments
Fit
Best for
- —Developers needing on-demand subnet calculations via API
- —Network automation pipelines requiring CIDR decomposition
- —AI agents performing IP network analysis tasks
Not for
- —Users who need comprehensive network scanning or monitoring
- —Anyone requiring detailed documentation or guaranteed SLAs before integration
Quick start
curl -i https://netintel-production-440c.up.railway.app/subnet/calc?cidr=192.168.1.0/24Endpoint
Quality
The endpoint is live (returns 402) but the challenge body is empty, providing no pricing or schema information. No documentation, OpenAPI spec, or examples exist on the server. Nearly everything is inferred from the URL path alone, making this effectively a stub listing.
Warnings
- —Empty x402 challenge body — no pricing, token, or network information available
- —No documentation, OpenAPI spec, or README found on the server
- —All endpoint capabilities and input/output formats are inferred from the URL path only
- —Request and response schemas are unknown