--- title: "The older profile lookup and the version 1 webhook signature retire on April 30, 2027: Trooth changelog - Trooth" description: "GET https://api.trooth.co/public/trust/{slug} is deprecated in favor of the canonical read, and the body-only webhook signature is legacy. Both stay in service until April 30, 2027." canonical_url: "https://trooth.co/changelog/2026-10-12-legacy-lookup-and-v1-signature-retire" markdown_url: "https://trooth.co/changelog/2026-10-12-legacy-lookup-and-v1-signature-retire.md" generated_from: "the rendered page, converted to Markdown when this was requested" agent_index: "https://trooth.co/llms.txt" --- [Back to changelog](https://trooth.co/changelog) Deprecation October 12, 20261 minute read # The older profile lookup and the version 1 webhook signature retire on April 30, 2027 GET https://api.trooth.co/public/trust/{slug} is deprecated in favor of the canonical read, and the body-only webhook signature is legacy. Both stay in service until April 30, 2027. ## What changed Every answer of the older lookup now carries Deprecation (RFC 9745), Sunset (RFC 8594) and a Link header naming the migration recipe and the canonical lookup for the same identifier. Every webhook delivery that still carries version 1 also carries x-trooth-signature-v1-sunset naming the date. The same release states each Model Context Protocol (MCP) tool's policy in tools/list, counts the public agent budget in one store shared by every server instance, and adds the assurance boundary to every answer. ## Why it changed The older lookup duplicated the canonical read under another address, and the version 1 signature carries no timestamp, so a captured delivery keeps verifying. ## Who is affected - **Affected:** Integrations that call the older lookup on api.trooth.co, and webhook receivers that check x-trooth-signature without a timestamp. Readers of trooth.co and receivers that check Standard Webhooks or version 2 are not affected. - **Availability:** Everyone. Nothing changes in what either answers before the date. - **Release stage:** Available. - **Areas:** API, MCP server, Webhooks, Trust Profiles, Legal. ## What to do **Action required.** Move calls to GET https://trooth.co/api/network/profile?q={domain-or-slug}&contract=2, and verify webhooks with the receiver recipe, before April 30, 2027. - **April 30, 2027:** GET /public/trust/{slug} on api.trooth.co answers 410 Gone after this date. - **April 30, 2027:** x-trooth-signature (version 1) is no longer sent after this date. ## Versions and migration Before: ```bash curl "https://api.trooth.co/public/trust/example.com" ``` After: ```bash curl "https://trooth.co/api/network/profile?q=example.com&contract=2" ``` ## Dates - **Announced:** October 12, 2026, the day this entry was written. Entries are never backdated. - **Released:** October 12, 2026. ## Read more - [Migrate from /public/trust](https://trooth.co/docs/trust-profile-api#migrate-from-public-trust) - [The webhook receiver recipe](https://trooth.co/docs/webhooks#verify) - [The versioning policy, section 6](https://trooth.co/api-versioning) On this page - What changed - Why it changed - Who is affected - What to do - Versions and migration - Dates - Read more [Deprecation](https://trooth.co/changelog?type=deprecation)[Improvement](https://trooth.co/changelog?type=improvement)[API](https://trooth.co/changelog?area=api)[MCP server](https://trooth.co/changelog?area=mcp)[Webhooks](https://trooth.co/changelog?area=webhooks)[Trust Profiles](https://trooth.co/changelog?area=trust-profile)[Legal](https://trooth.co/changelog?area=legal) [Back to changelog](https://trooth.co/changelog) ## Related changes - [OCT.07NewTrooth command-line tool 0.14.0: a company's own signed declaration, and the proof behind each tie in the public recordCLI +1](https://trooth.co/changelog/2026-10-07-cli-0-14-0-declarations) - [OCT.07NewTrooth command-line tool 0.13.0: the guard for agent actions, and what each public record reading rests onCLI +1](https://trooth.co/changelog/2026-10-07-cli-0-13-0-guard) - [OCT.07NewTrooth command-line tool 0.12.0: MCP tool fingerprints, more of the public record, and a hardware key for the logCLI +1](https://trooth.co/changelog/2026-10-07-cli-0-12-0-mcp-tools) - [OCT.07NewTrooth command-line tool 0.11.0: witnesses for the log, and a signed public recordCLI +1](https://trooth.co/changelog/2026-10-07-cli-0-11-0-witnesses) - [OCT.07NewTrooth command-line tool 0.10.0: what a company published outside its own siteCLI +1](https://trooth.co/changelog/2026-10-07-cli-0-10-0-public-record) - [OCT.06NewTrooth command-line tool 0.9.0: a public log of every signed readingCLI +1](https://trooth.co/changelog/2026-10-06-cli-0-9-0-log) ## Follow what changes at Trooth Every entry by email, or a feed narrowed to one area or to the changes that need you to act. ## Product updates by email Occasional notes when something on this page changes. You get one confirmation email when you subscribe, every email carries an unsubscribe link, and the address is never sold or shared. Email address [RSS](https://trooth.co/changelog/rss.xml)[API only](https://trooth.co/changelog/rss.xml?area=api)[Needs action](https://trooth.co/changelog/rss.xml?action=required) ## Structured data ```json { "@context": "https://schema.org", "@graph": [ { "@type": "Organization", "@id": "https://trooth.co/#org", "name": "Trooth", "legalName": "Trooth, LLC", "alternateName": [ "Trooth, LLC", "Trooth Network", "trooth.co" ], "url": "https://trooth.co", "logo": { "@type": "ImageObject", "@id": "https://trooth.co/#logo", "url": "https://trooth.co/brand/trooth-mark_black-on-white_1024.png", "contentUrl": "https://trooth.co/brand/trooth-mark_black-on-white_1024.png", "width": 1024, "height": 1024, "caption": "Trooth" }, "image": { "@id": "https://trooth.co/#logo" }, "description": "Trooth is an infrastructure and cybersecurity company providing Machine-Readable Trust. The Trooth Network keeps one current Machine-Readable Trust Profile per company, each fact sourced. Trooth signs what it witnessed; company declarations are unsigned.", "foundingDate": "2025-12-16", "address": { "@type": "PostalAddress", "streetAddress": "777 Brickell Ave, Suite 500, PMB 1174", "addressLocality": "Miami", "addressRegion": "FL", "postalCode": "33131", "addressCountry": "US" }, "contactPoint": { "@type": "ContactPoint", "contactType": "customer support", "email": "hello@trooth.co", "url": "https://trooth.co/contact" }, "sameAs": [ "https://x.com/Troothllc", "https://github.com/troothllc", "https://www.crunchbase.com/organization/trooth", "https://www.wikidata.org/wiki/Q141292994", "https://www.youtube.com/@Troothllc", "https://www.trustpilot.com/review/trooth.co" ] }, { "@type": "WebSite", "@id": "https://trooth.co/#website", "url": "https://trooth.co", "name": "Trooth", "alternateName": "Trooth Network", "inLanguage": "en", "publisher": { "@id": "https://trooth.co/#org" }, "potentialAction": { "@type": "SearchAction", "target": { "@type": "EntryPoint", "urlTemplate": "https://trooth.co/network?q={search_term_string}" }, "query-input": "required name=search_term_string" } }, { "@type": "ItemList", "@id": "https://trooth.co/#sitelinks", "name": "Trooth sitelinks", "itemListElement": [ { "@type": "SiteNavigationElement", "position": 1, "name": "Join Trooth for free", "url": "https://trooth.co/signup" }, { "@type": "SiteNavigationElement", "position": 2, "name": "Company, Trooth", "url": "https://trooth.co/network/company/trooth" }, { "@type": "SiteNavigationElement", "position": 3, "name": "Trooth Network", "url": "https://trooth.co/network" } ] } ] } ``` ```json { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://trooth.co/" }, { "@type": "ListItem", "position": 2, "name": "Changelog", "item": "https://trooth.co/changelog" }, { "@type": "ListItem", "position": 3, "name": "The older profile lookup and the version 1 webhook signature retire on April 30, 2027", "item": "https://trooth.co/changelog/2026-10-12-legacy-lookup-and-v1-signature-retire" } ] } ```