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WaleedandMarcus Chandra
8cce661a37
* feat(api): add proxyUrl for residential/custom proxy egress on the API block The HTTP/API block egresses from the app runtime's fixed datacenter IPs via secureFetchWithPinnedIP, so targets behind Cloudflare/WAF that block datacenter IPs (e.g. state .gov license portals) return 403/429 even when the identical request works from a browser. There was no way to route a request through a residential/custom proxy. Add an optional `proxyUrl` field (Advanced) to the API block. When set, the request routes through the given http:// proxy so it egresses from that proxy's IP. Security: - validateAndPinProxyUrl resolves the proxy host's DNS and blocks private/reserved/loopback IPs (same SSRF guard as target URLs), then pins the connection by rewriting the host to the resolved IP (creds/port preserved), closing the DNS-rebinding window. - Restricted to the http: proxy scheme (https/socks rejected) so host pinning is safe without breaking TLS-to-proxy SNI. - Target-IP pinning is intentionally bypassed when a proxy is active (the proxy resolves the target); target URL validation still runs. Threaded block field -> http tool param -> formatRequestParams -> executeToolRequest (validate + pin) -> secureFetchWithPinnedIP, which swaps its pinned Node agent for HttpsProxyAgent/HttpProxyAgent (keyed off target protocol) when proxyUrl is set. * docs(api): document the Proxy URL advanced field and steer proxy credentials to env vars * fix(api): reject loopback/private proxy hosts unconditionally, closing the self-hosted rebinding gap * chore(api): tighten proxy-path inline comments --------- Co-authored-by: Marcus Chandra <mzxchandra@gmail.com>
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