50 pages for prefix.

Or, for the model with the same capabilities and no access approval requirement: Claude Developer Platform · in the page about-claude/models/migration-guide …task advances; without it, a changed tool list invalidates the cached prefix. 5. **Re-tune length and verbosity prompts:** Default visible responses and written deliverables run longer on Claude Opus… optimizing-for-cost-and-intelligence Claude Developer Platform · in the page about-claude/models/optimizing-for-cost-and-intelligence …but each resend costs about a tenth as much and processes faster: the prefix is billed at the [cache-read rate](https://platform.claude.com/docs/en/build-with-claude/prompt-caching#pricing), a tenth o… PDF Processing Claude Developer Platform · in the page agents-and-tools/agent-skills/best-practices …te_issue` are the tool names within those servers Without the server prefix, Claude may fail to locate the tool, especially when multiple MCP servers are available. ### Avoid assuming tools are inst… claude-api-skill Claude Developer Platform · in the page agents-and-tools/agent-skills/claude-api-skill …cessing:** Offline batch processing at 50% cost * **Prompt caching:** Prefix-stability design, breakpoint placement, and silent-invalidator audit * **Model migration:** Step-by-step guidance for migra… concepts Claude Developer Platform · in the page agents-and-tools/mcp-tunnels/concepts …ath `/etc/mcp-gateway/config.yaml` and Helm `gateway.config.*` values prefix) | | **cloudflared** | Cloudflare's open-source tunnel connector. Initiates the outbound-only connections from your… console Claude Developer Platform · in the page agents-and-tools/mcp-tunnels/console …the routing"> The card shows two optional fields: **Subdomain** (prefixed to the tunnel domain) and **Path** (appended after it). Fill in one or both, depending on how your proxy's routes are con… advisor-tool Claude Developer Platform · in the page agents-and-tools/tool-use/advisor-tool …l is the (N-1)th call's prompt with one more segment appended, so the prefix is stable across calls. With `caching` enabled, each advisor call writes a cache entry, and the next call reads up to that… bash-tool Claude Developer Platform · in the page agents-and-tools/tool-use/bash-tool …l smuggle an expansion if shellOperators[token] || strings.HasPrefix(bare, "$") || strings.HasPrefix(bare, "`") { return false, fmt.Sprintf("Shell operator %q is not allowed", token)… browser-use-tool Claude Developer Platform · in the page agents-and-tools/tool-use/browser-use-tool …ur-executor). Check the scheme with a URL parser rather than a string prefix; the API never sees the navigation and can't reject it for you. 5. Leave `javascript_exec` and `file_upload` disabled unl… computer-use-tool Claude Developer Platform · in the page agents-and-tools/tool-use/computer-use-tool …hes*, not one each turn. Dropping a screenshot every turn changes the prefix every turn and invalidates the cache. A reasonable default is to keep the last three screenshots and prune every 25 turns,… define-tools Claude Developer Platform · in the page agents-and-tools/tool-use/define-tools …in tool names.** When your tools span multiple services or resources, prefix names with the service (for example, `github_list_prs`, `slack_send_message`). This makes tool selection unambiguous as you… manage-tool-context Claude Developer Platform · in the page agents-and-tools/tool-use/manage-tool-context …our tool definitions are stable, cache them once and reuse the cached prefix across thousands of requests. This is the right choice when the toolset is large but fixed. ### Context editing Context e… memory-tool Claude Developer Platform · in the page agents-and-tools/tool-use/memory-tool …nts-and-tools/tool-use/handle-tool-calls)). The `/memories` path is a prefix that your handler maps onto real storage, such as a per-user directory or keys in a database. Memory lives entirely in your… server-tools Claude Developer Platform · in the page agents-and-tools/tool-use/server-tools …when a server-executed tool runs. Its `id` field uses the `srvtoolu_` prefix to distinguish it from client tool calls: ```json { "type": "server_tool_use", "id": "srvtoolu_01A2B3C4D5E6F7G8H9",… tool-reference Claude Developer Platform · in the page agents-and-tools/tool-use/tool-reference …tool instead, because deferred definitions are not part of the cached prefix. `cache_control` goes on the entry only; for where the breakpoint lands, including markers inside a batch action, see [Too… Log at info level Claude Developer Platform · in the page agents-and-tools/tool-use/tool-runner …, so the next iteration // re-sends the same conversation prefix with the larger budget. runner.setNextParams(runner.params().toBuilder().maxTokens(doubled).build()); }… tool-search-tool Claude Developer Platform · in the page agents-and-tools/tool-use/tool-search-tool …. Internally, the API excludes deferred tools from the system-prompt prefix. When Claude discovers a deferred tool through tool search, the API appends a `tool_reference` block inline in the conversa… tool-use-with-prompt-caching Claude Developer Platform · in the page agents-and-tools/tool-use/tool-use-with-prompt-caching …t tool in your `tools` array. This caches the entire tool-definitions prefix, from the first tool through the marked breakpoint: ```json { "tools": [ { "name": "get_weather", "descr… Admin Claude Developer Platform · in the page api/admin …s with a reserved form), it is server-encoded into a stable `{prefix}_{32-hex}` form — a shortened readable prefix of the name plus a hash — from which the published name is not recove… External Keys Claude Developer Platform · in the page api/admin/external_keys …- `id: string` Identifier of the external key config. A tagged ID prefixed `ekey_`, or — for organizations on the Claude Platform on AWS — the AWS KMS key ARN. - `attachment: object or object`… Create External Key Claude Developer Platform · in the page api/admin/external_keys/create …- `id: string` Identifier of the external key config. A tagged ID prefixed `ekey_`, or — for organizations on the Claude Platform on AWS — the AWS KMS key ARN. - `attachment: object or object`… List External Keys Claude Developer Platform · in the page api/admin/external_keys/list …`id: string` Identifier of the external key config. A tagged ID prefixed `ekey_`, or — for organizations on the Claude Platform on AWS — the AWS KMS key ARN. - `attachment: object or object`… Get External Key Claude Developer Platform · in the page api/admin/external_keys/retrieve …- `id: string` Identifier of the external key config. A tagged ID prefixed `ekey_`, or — for organizations on the Claude Platform on AWS — the AWS KMS key ARN. - `attachment: object or object`… Update External Key Claude Developer Platform · in the page api/admin/external_keys/update …- `id: string` Identifier of the external key config. A tagged ID prefixed `ekey_`, or — for organizations on the Claude Platform on AWS — the AWS KMS key ARN. - `attachment: object or object`… Federation Rules Claude Developer Platform · in the page api/admin/federation_rules …nant identity via an identity-bearing claim, a tenant-pinning subject prefix (such as `repo:YOUR_ORG/...`), or a CEL condition referencing one of those identity claims (e.g. `claims.repository_owner`)… Archive Federation Rule Claude Developer Platform · in the page api/admin/federation_rules/archive …`true`) is rejected with 400. maxLength: 4096 - `subject_prefix: optional string or null` Match the verified JWT `sub` claim. Exact match unless the value ends with `*`, in which c… Create Federation Rule Claude Developer Platform · in the page api/admin/federation_rules/create …nant identity via an identity-bearing claim, a tenant-pinning subject prefix (such as `repo:YOUR_ORG/...`), or a CEL condition referencing one of those identity claims (e.g. `claims.repository_owner`)… List Federation Rules Claude Developer Platform · in the page api/admin/federation_rules/list …`true`) is rejected with 400. maxLength: 4096 - `subject_prefix: optional string or null` Match the verified JWT `sub` claim. Exact match unless the value ends with `*`, in which c… Get Federation Rule Claude Developer Platform · in the page api/admin/federation_rules/retrieve …`true`) is rejected with 400. maxLength: 4096 - `subject_prefix: optional string or null` Match the verified JWT `sub` claim. Exact match unless the value ends with `*`, in which c… Update Federation Rule Claude Developer Platform · in the page api/admin/federation_rules/update …nant identity via an identity-bearing claim, a tenant-pinning subject prefix (such as `repo:YOUR_ORG/...`), or a CEL condition referencing one of those identity claims (e.g. `claims.repository_owner`)… MCP Tunnels Claude Developer Platform · in the page api/admin/mcp_tunnels …string` Return only tunnels in this Workspace. Accepts a `wrkspc_`-prefixed Workspace ID; omit to list tunnels across all Workspaces. ### Headers - `"anthropic-beta": array of "mcp-tunnels-2026… List Tunnels Claude Developer Platform · in the page api/admin/mcp_tunnels/list …string` Return only tunnels in this Workspace. Accepts a `wrkspc_`-prefixed Workspace ID; omit to list tunnels across all Workspaces. ## Headers - `"anthropic-beta": array of "mcp-tunnels-2026-… RBAC Roles Claude Developer Platform · in the page api/admin/rbac_roles …s with a reserved form), it is server-encoded into a stable `{prefix}_{32-hex}` form — a shortened readable prefix of the name plus a hash — from which the published name is not recove… Permissions Claude Developer Platform · in the page api/admin/rbac_roles/permissions …s with a reserved form), it is server-encoded into a stable `{prefix}_{32-hex}` form — a shortened readable prefix of the name plus a hash — from which the published name is not recove… List RBAC Role Permissions Claude Developer Platform · in the page api/admin/rbac_roles/permissions/list …s with a reserved form), it is server-encoded into a stable `{prefix}_{32-hex}` form — a shortened readable prefix of the name plus a hash — from which the published name is not recove… Beta Claude Developer Platform · in the page api/beta …one and returns `diagnostics.cache_miss_reason` when the prompt-cache prefix could not be reused. Pass `null` on the first turn to opt in without a prior message to compare. maxLength: 256 - `fa… Memory Stores Claude Developer Platform · in the page api/beta/memory_stores …ional number` `0` (or omitted) returns all descendants below `path_prefix` (recursive). `1` returns immediate children only; deeper entries roll up as `memory_prefix` items. `depth=1` behaves like… Memories Claude Developer Platform · in the page api/beta/memory_stores/memories …ional number` `0` (or omitted) returns all descendants below `path_prefix` (recursive). `1` returns immediate children only; deeper entries roll up as `memory_prefix` items. `depth=1` behaves like… List memories Claude Developer Platform · in the page api/beta/memory_stores/memories/list …ional number` `0` (or omitted) returns all descendants below `path_prefix` (recursive). `1` returns immediate children only; deeper entries roll up as `memory_prefix` items. `depth=1` behaves like… Messages Claude Developer Platform · in the page api/beta/messages …one and returns `diagnostics.cache_miss_reason` when the prompt-cache prefix could not be reused. Pass `null` on the first turn to opt in without a prior message to compare. maxLength: 256 - `fa… Batches Claude Developer Platform · in the page api/beta/messages/batches …one and returns `diagnostics.cache_miss_reason` when the prompt-cache prefix could not be reused. Pass `null` on the first turn to opt in without a prior message to compare. maxLength: 256… Create a Message Batch Claude Developer Platform · in the page api/beta/messages/batches/create …one and returns `diagnostics.cache_miss_reason` when the prompt-cache prefix could not be reused. Pass `null` on the first turn to opt in without a prior message to compare. maxLength: 256… Retrieve Message Batch results Claude Developer Platform · in the page api/beta/messages/batches/results …Explains why the prompt cache could not fully reuse the prefix from the request identified by `diagnostics.previous_message_id`. `null` means diagnosis is still pending — the response wa… Count tokens in a Message Claude Developer Platform · in the page api/beta/messages/count_tokens …iven TTL so subsequent calls in the same conversation read the stable prefix. When omitted, the advisor prompt is not cached. - `defer_loading: optional boolean` If true, tool will not be… Create a Message Claude Developer Platform · in the page api/beta/messages/create …one and returns `diagnostics.cache_miss_reason` when the prompt-cache prefix could not be reused. Pass `null` on the first turn to opt in without a prior message to compare. maxLength: 256 - `fa… Organization Claude Developer Platform · in the page api/beta/organization …`id: string` Identifier of the external key config. A tagged ID prefixed `ekey_`, or — for organizations on the Claude Platform on AWS — the AWS KMS key ARN. - `attachment: BetaExternalKeyAtt… External Keys Claude Developer Platform · in the page api/beta/organization/external_keys …`id: string` Identifier of the external key config. A tagged ID prefixed `ekey_`, or — for organizations on the Claude Platform on AWS — the AWS KMS key ARN. - `attachment: BetaExternalKeyAtt… Create External Key Claude Developer Platform · in the page api/beta/organization/external_keys/create …`id: string` Identifier of the external key config. A tagged ID prefixed `ekey_`, or — for organizations on the Claude Platform on AWS — the AWS KMS key ARN. - `attachment: BetaExternalKeyAtt… List External Keys Claude Developer Platform · in the page api/beta/organization/external_keys/list …`id: string` Identifier of the external key config. A tagged ID prefixed `ekey_`, or — for organizations on the Claude Platform on AWS — the AWS KMS key ARN. - `attachment: BetaExternalKeyAtt… Get External Key Claude Developer Platform · in the page api/beta/organization/external_keys/retrieve …`id: string` Identifier of the external key config. A tagged ID prefixed `ekey_`, or — for organizations on the Claude Platform on AWS — the AWS KMS key ARN. - `attachment: BetaExternalKeyAtt…