Web search and web fetch changedthird-party/claude-desktop/web-tools
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Upstream edited this page at 25 Sep 2026 17:09 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 25 Sep 2026 17:37 UTC.
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98Set the per-entry `toolPolicy` to `"allow"` so users aren't prompted to approve each search. `headersHelper` is an executable that prints the auth header as a JSON object to stdout; it follows the same execution model as [`inferenceCredentialHelper`](/docs/third-party/claude-desktop/credential-helper) (run with no arguments, exit 0, stdout read as JSON), but the output here is a flat header map, not the `{token, headers}` shape `inferenceCredentialHelper` uses.
98Set the per-entry `toolPolicy` to `"allow"` so users aren't prompted to approve each search. `headersHelper` is an executable that prints the auth header as a JSON object to stdout; it follows the same execution model as [`inferenceCredentialHelper`](/docs/third-party/claude-desktop/credential-helper) (exit 0, stdout read as JSON) but always runs with no arguments, and the output here is a flat header map, not the `{token, headers}` shape `inferenceCredentialHelper` uses.
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100100| Provider | Header your script should output |
101101| -------- | ----------------------------------- |
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105105| `custom` | Whatever your search server expects |
106106
107107You can use a static `headers` object instead if you don't need a secrets manager.
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109With `provider: "custom"`, Claude Desktop sends each search as an HTTP `POST` to `customUrl` exactly as written (nothing is substituted into the URL), with `Content-Type: application/json`, any headers from `headers` and `headersHelper`, and the body `{"q": "<search terms>"}`. Your server must answer within 15 seconds with a 2xx status and a JSON body of the form `{"results": [{"title": "...", "url": "...", "snippet": "..."}]}`. Results without a `url` are dropped, at most 10 are used, and each `snippet` is truncated to 600 characters.
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109111#### Gateway-side search
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