update

An API operation for changing an existing agent. An agent is a configured software assistant that can receive requests and return results.

In plain words
What is it for?
Use it when building code that sends a POST request to update an agent, including its ID and optional Anthropic API settings.
Why use it?
It provides the documented request details needed to update an agent without guessing the URL, headers, or accepted options.

Agent

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/thevibeworks/claude-code-docs/update
Clone the repo
git clone --depth 1 https://github.com/thevibeworks/claude-code-docs
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 8,822 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin 94% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.08822
Opus 5 $0.00000 $0.04411
Sonnet 5 $0.00000 $0.01764
Haiku 4.5 $0.00000 $0.00882

Measured yesterday against content hash 38a4aa3fc277, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

update scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl https://api.anthropic.com/v1/agents/$AGENT_ID \
Origin

This is a copy

94% identical to create — 113 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

content/en/api/beta/agents/update.md · 1,384 lines

How it starts

The opening of the file, as written. The whole thing — 1,384 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Update Agent

POST /v1/agents/{agent_id}

Update Agent

Path parameters

  • agent_id: string

Headers

  • "anthropic-beta": optional array of AnthropicBeta

    Optional header to specify the beta version(s) you want to use.

    • string

    • "message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 38 more

      • "message-batches-2024-09-24"

      • "prompt-caching-2024-07-31"

      • "computer-use-2024-10-22"

      • "computer-use-2025-01-24"

      • "pdfs-2024-09-25"

      • "token-counting-2024-11-01"

      • "token-efficient-tools-2025-02-19"

      • "output-128k-2025-02-19"

      • "files-api-2025-04-14"

      • "mcp-client-2025-04-04"

      • "mcp-client-2025-11-20"

      • "dev-full-thinking-2025-05-14"

      • "interleaved-thinking-2025-05-14"

      • "code-execution-2025-05-22"

      • "extended-cache-ttl-2025-04-11"

      • "context-1m-2025-08-07"

      • "context-management-2025-06-27"

      • "model-context-window-exceeded-2025-08-26"

      • "skills-2025-10-02"

      • "fast-mode-2026-02-01"

      • "output-300k-2026-03-24"

      • "user-profiles-2026-03-24"

      • "user-profiles-2026-08-18"

      • "advisor-tool-2026-03-01"

      • "managed-agents-2026-04-01"

      • "cache-diagnosis-2026-04-07"

      • "dreaming-2026-04-21"

      • "thinking-token-count-2026-05-13"

      • "server-side-fallback-2026-06-01"

      • "server-side-fallback-2026-07-01"

      • "fallback-credit-2026-06-01"

      • "fallback-credit-2026-07-01"

      • "agent-memory-2026-07-22"

      • "mid-conversation-tool-changes-2026-07-01"

      • "compact-2026-01-12"

      • "computer-use-2025-11-24"

      • "mcp-tunnels-2026-06-22"

      • "structured-outputs-2025-11-13"

      • "task-budgets-2026-03-13"

      • "thinking-display-updates-2026-08-18"

      • "ce-user-management-2026-07-13"

Body parameters

  • description: optional string or null

    Description. Omit to preserve; send empty string or null to clear.

Read the full file on GitHub · 1,384 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 1,384 lines · 0 tokens per session scan A 38a4aa3fc277

Subscribe to this mod's changes

update is an agent published in the GitHub repository thevibeworks/claude-code-docs (38 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 8,822 tokens. A static security scan graded it A with 1 finding (makes network calls). It is 94% identical to create, differing in 113 lines, and is treated as a copy.

Related

Other agents, from other repositories