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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeDocsClaude Developer Platform 22 Oct 2026
One change · api

web-fetch-tool changedagents-and-tools/tool-use/web-fetch-tool

Nearest release: v2.1.308, published 2 hours after this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

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First seen 14 Aug 2026 this site's first read of the page
Recorded edits16to this page, all time

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522522 
523523Here's an example response structure:
524524 
525```json Output
525```text Output
526526{
527527 "role": "assistant",
528528 "content": [
from line 606
606606 
607607For PDF documents, content is returned as base64-encoded data:
608608 
609```json Output
609```text Output wrap
610610{
611611 "type": "web_fetch_tool_result",
612612 "tool_use_id": "srvtoolu_02",
from line 631
631631 
632632When the web fetch tool encounters an error, the Claude API returns a 200 (success) response with the error represented in the response body. Claude receives the error result and continues the turn. For example:
633633 
634```json Output
634```text Output wrap
635635{
636636 "type": "web_fetch_tool_result",
637637 "tool_use_id": "srvtoolu_a93jad",
from line 958
958958 
959959With streaming enabled, fetch events are part of the stream with a pause during content retrieval:
960960 
961```sse Output
961```text Output
962962event: message_start
963963data: {"type": "message_start", "message": {"id": "msg_abc123", "type": "message"}}
964964 
from line 991
991991 
992992Web fetch usage has **no additional charges** beyond standard token costs:
993993 
994```json
994```text wrap
995995{
996996 "usage": {
997997 "input_tokens": 25039,
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