--- title: Slashing agent token costs by 98% with RFC... description: Cloudflare now returns RFC 9457-compliant structured error responses (JSON and Markdown) to AI agents instead of HTML error pages. By sending an appropriate... canonical: https://daily.dev/posts/slashing-agent-token-costs-by-98-with-rfc-9457-compliant-error-responses-saqpbciim twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Slashing agent token costs by 98% with RFC 9457-compliant error responses | daily.dev og:description: Cloudflare now returns RFC 9457-compliant structured error responses (JSON and Markdown) to AI agents instead of HTML error pages. By sending an appropriate... og:url: https://daily.dev/posts/slashing-agent-token-costs-by-98-with-rfc-9457-compliant-error-responses-saqpbciim og:image: https://api.daily.dev/og/posts/sAQpbciiM.png og:image:alt: Slashing agent token costs by 98% with RFC 9457-compliant error responses og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Slashing agent token costs by 98% with RFC 9457-compliant error responses **[Cloudflare](https://daily.dev/sources/cloudflare)** · 12 min read · 1 upvotes · 0 comments ## Summary Cloudflare now returns RFC 9457-compliant structured error responses (JSON and Markdown) to AI agents instead of HTML error pages. By sending an appropriate Accept header (text/markdown, application/json, or application/problem+json), agents receive compact, machine-readable payloads with actionable fields like retryable, retry_after, and owner_action_required. This reduces payload size and token usage by over 98% compared to HTML. The feature is live network-wide with no configuration required from site owners, covering all 1xxx-class Cloudflare error codes, with 4xx/5xx coverage planned next. A Python example demonstrates how agents can parse YAML frontmatter to implement deterministic retry and escalation logic. ## Full article daily.dev links to this article rather than hosting it. 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Is your site agent-ready?](https://daily.dev/posts/introducing-the-agent-readiness-score-is-your-site-agent-ready--qmivrcleo) · Cloudflare · 1 upvotes · 0 comments --- Tags: [#ai-agents](https://daily.dev/tags/ai-agents), [#cloudflare](https://daily.dev/tags/cloudflare) [View this post on daily.dev](https://daily.dev/posts/slashing-agent-token-costs-by-98-with-rfc-9457-compliant-error-responses-saqpbciim) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Slashing agent token costs by 98% with RFC 9457-compliant error responses","url":"https://daily.dev/posts/slashing-agent-token-costs-by-98-with-rfc-9457-compliant-error-responses-saqpbciim","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/slashing-agent-token-costs-by-98-with-rfc-9457-compliant-error-responses-saqpbciim"},"datePublished":"2026-03-11T13:22:23.417Z","dateModified":"2026-03-11T13:22:48.301Z","description":"Cloudflare now returns RFC 9457-compliant structured error responses (JSON and Markdown) to AI agents instead of HTML error pages. 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