MeshJS · QSchlegel · Jul 22, 2026 · Jul 22, 2026 · Jul 22, 2026
diff --git a/src/__tests__/seoFallback.test.ts b/src/__tests__/seoFallback.test.ts
@@ -0,0 +1,91 @@
+import React from "react";
+import ReactDOMServer from "react-dom/server";
+
+import SeoFallback from "@/components/ui/seo-fallback";
+import { buildJsonLd, DEFAULT_DESCRIPTION, INDEXABLE_ROUTES } from "@/lib/seo";
+import { buildLlmsTxt } from "@/pages/llms.txt";
+
+/**
+ * These guard the "even a no-JS fetcher sees real content" behaviour: the SPA
+ * renders an empty body server-side, so SeoFallback (in <noscript>) and the
+ * server-rendered JSON-LD are what crawlers / LLM fetchers actually read.
+ */
+describe("SeoFallback — no-JS crawler/LLM content fallback", () => {
+  const html = ReactDOMServer.renderToStaticMarkup(
+    React.createElement(SeoFallback),
+  );
+
+  it("is wrapped in <noscript> so JS-enabled visitors never render it", () => {
+    expect(html.startsWith("<noscript>")).toBe(true);
+    expect(html.endsWith("</noscript>")).toBe(true);
+  });
+
+  it("exposes the product headline and description as readable text", () => {
+    expect(html).toContain("Multisig Security");
+    expect(html).toContain(DEFAULT_DESCRIPTION);
+  });
+
+  it("links to every public surface", () => {
+    for (const path of [
+      "/features",
+      "/governance",
+      "/governance/drep",
+      "/api-docs",
+      "/dapps",
+      "/wallets/import-wallet",
+    ]) {
+      // Absolute canonical URLs, so each path appears as an href suffix.
+      expect(html).toContain(`${path}"`);
+    }
+  });
+
+  it("surfaces the bot-API entry points for AI agents", () => {
+    for (const path of ["/llms.txt", "/api/swagger", "/api/skill"]) {
+      expect(html).toContain(`${path}"`);
+    }
+  });
+});
+
+describe("buildLlmsTxt — /llms.txt for AI agents", () => {
+  const txt = buildLlmsTxt();
+
+  it("starts with an llms.txt H1 + summary blockquote", () => {
+    expect(txt.startsWith("# ")).toBe(true);
+    expect(txt).toContain(`> ${DEFAULT_DESCRIPTION}`);
+  });
+
+  it("points to the machine-readable spec and downloadable skill", () => {
+    expect(txt).toContain("/api/swagger");
+    expect(txt).toContain("/api/skill");
+  });
+
+  it("documents the 4-step bot onboarding and bearer auth", () => {
+    expect(txt).toContain("Authorization: Bearer");
+    for (const ep of [
+      "/api/v1/botRegister",
+      "/api/v1/botClaim",
+      "/api/v1/botPickupSecret",
+      "/api/v1/botAuth",
+    ]) {
+      expect(txt).toContain(ep);
+    }
+  });
+
+  it("is listed in the sitemap route set", () => {
+    expect(INDEXABLE_ROUTES.map((r) => r.path)).toContain("/llms.txt");
+  });
+});
+
+describe("buildJsonLd — structured data for the initial HTML", () => {
+  const types = (pathname: string) =>
+    buildJsonLd(pathname).map((entry) => entry["@type"] as string);
+
+  it("emits Organization + WebSite site-wide", () => {
+    expect(types("/features")).toEqual(["Organization", "WebSite"]);
+  });
+
+  it("adds SoftwareApplication only on the home page", () => {
+    expect(types("/")).toContain("SoftwareApplication");
+    expect(types("/features")).not.toContain("SoftwareApplication");
+  });
+});
diff --git a/src/components/ui/json-ld.tsx b/src/components/ui/json-ld.tsx
diff --git a/src/components/ui/metatags.tsx b/src/components/ui/metatags.tsx
@@ -1,5 +1,4 @@
 import Head from "next/head";
-import JsonLd from "@/components/ui/json-ld";
 import {
   SITE_NAME,
   TWITTER_HANDLE,
@@ -127,10 +126,16 @@ export default function Metatags({
           name="apple-mobile-web-app-status-bar-style"
           content="black-translucent"
         />
-      </Head>
 
-      {/* Structured data (injected safely into <head> on the client). */}
-      <JsonLd json={jsonLd} />
+        {/* Structured data, server-rendered so non-JS crawlers and LLM fetchers
+            (which never execute our client bundle) read it in the initial HTML.
+            The content is app-controlled JSON.stringify output; escaping "<" to
+            its "<" JSON form keeps it valid JSON while making a "</script>"
+            breakout impossible, so no raw-HTML injection is involved. */}
+        <script type="application/ld+json">
+          {jsonLd.replace(/</g, "\\u003c")}
+        </script>
+      </Head>
     </>
   );
 }
diff --git a/src/components/ui/seo-fallback.tsx b/src/components/ui/seo-fallback.tsx
@@ -0,0 +1,121 @@
+import {
+  SITE_NAME,
+  DEFAULT_DESCRIPTION,
+  routeSeo,
+  absoluteUrl,
+} from "@/lib/seo";
+
+/**
+ * Server-rendered, no-JavaScript content fallback for crawlers and LLM fetchers.
+ *
+ * The app is a client-only SPA: the whole UI lives behind an `ssr:false`
+ * MeshProvider boundary (the wallet SDK assumes a browser), so the server HTML
+ * body is just an empty `<div id="__next">`. A consumer that doesn't execute
+ * JavaScript — search-engine crawlers, social unfurlers, ChatGPT's URL fetcher /
+ * GPTBot, `curl` — therefore can't tell what the site is.
+ *
+ * This block renders inside <noscript>, so real (JS-enabled) visitors never see
+ * it, while no-JS consumers get a readable description of the product plus links
+ * to every public surface. Copy and links derive from @/lib/seo so they stay in
+ * sync with the page metadata and sitemap. Absolute URLs (via {@link absoluteUrl})
+ * point at the canonical host, consolidating link equity there.
+ */
+
+// Public, indexable surfaces, in nav order. Labels mirror the routeSeo titles;
+// the longer per-link blurb is pulled from routeSeo at render time.
+const FALLBACK_LINKS = [
+  { path: "/features", label: "Features" },
+  { path: "/governance", label: "Cardano Governance" },
+  { path: "/governance/drep", label: "DRep Explorer" },
+  { path: "/api-docs", label: "API & Bot Documentation" },
+  { path: "/dapps", label: "DApps" },
+  { path: "/wallets/import-wallet", label: "Import a Multisig Wallet" },
+] as const;
+
+// Machine-readable entry points, so an AI agent that lands on the homepage HTML
+// (not just /llms.txt) can discover how to drive the bot API.
+const BOT_API_LINKS = [
+  {
+    path: "/llms.txt",
+    label: "llms.txt",
+    blurb: "AI-oriented overview of the site and bot API, with a quickstart.",
+  },
+  {
+    path: "/api/swagger",
+    label: "OpenAPI 3.0 spec (JSON)",
+    blurb: "Machine-readable definition of every bot endpoint.",
+  },
+  {
+    path: "/api/skill",
+    label: "Agent skill (Markdown)",
+    blurb: "Downloadable skill describing the full bot workflow.",
+  },
+  {
+    path: "/api-docs",
+    label: "Interactive API docs",
+    blurb: "Human Swagger UI with a wallet-based token generator.",
+  },
+] as const;
+
+const EXTERNAL_LINKS = [
+  { href: "https://github.com/MeshJS/multisig", label: "Source code (GitHub)" },
+  { href: "https://meshjs.dev", label: "Mesh SDK" },
+  { href: "https://discord.gg/dH48jH3BKa", label: "Community (Discord)" },
+] as const;
+
+export default function SeoFallback() {
+  return (
+    <noscript>
+      <main>
+        <h1>Manage Cardano Treasuries with Multisig Security</h1>
+        <p>{DEFAULT_DESCRIPTION}</p>
+        <p>
+          {SITE_NAME} is a free, open-source, Cardano-native wallet built by Mesh.
+          Secure treasuries, participate in governance, and collaborate with M-of-N
+          multi-signature approvals — every transaction requires a quorum of
+          signers, so no single key can move funds alone.
+        </p>
+
+        <h2>What you can do</h2>
+        <ul>
+          <li>Create an M-of-N multi-signature wallet and invite co-signers.</li>
+          <li>Review and co-sign transactions with a required approval threshold.</li>
+          <li>Vote on Cardano governance proposals and register as a DRep.</li>
+          <li>Delegate stake and earn rewards from the treasury.</li>
+          <li>Automate signing with the REST API and bot integrations.</li>
+          <li>Import an existing multisig wallet and keep collaborating.</li>
+        </ul>
+
+        <h2>Explore</h2>
+        <ul>
+          {FALLBACK_LINKS.map((link) => (
+            <li key={link.path}>
+              <a href={absoluteUrl(link.path)}>{link.label}</a>
+              {routeSeo[link.path]?.description
+                ? ` — ${routeSeo[link.path]?.description}`
+                : null}
+            </li>
+          ))}
+        </ul>
+
+        <h2>Bot API (for AI agents)</h2>
+        <ul>
+          {BOT_API_LINKS.map((link) => (
+            <li key={link.path}>
+              <a href={absoluteUrl(link.path)}>{link.label}</a> — {link.blurb}
+            </li>
+          ))}
+        </ul>
+
+        <h2>Resources</h2>
+        <ul>
+          {EXTERNAL_LINKS.map((link) => (
+            <li key={link.href}>
+              <a href={link.href}>{link.label}</a>
+            </li>
+          ))}
+        </ul>
+      </main>
+    </noscript>
+  );
+}
diff --git a/src/lib/seo.ts b/src/lib/seo.ts
@@ -156,6 +156,7 @@ export const INDEXABLE_ROUTES: SitemapRoute[] = [
   { path: "/governance", changefreq: "daily", priority: 0.8 },
   { path: "/governance/drep", changefreq: "daily", priority: 0.7 },
   { path: "/api-docs", changefreq: "monthly", priority: 0.6 },
+  { path: "/llms.txt", changefreq: "monthly", priority: 0.5 },
   { path: "/wallets/import-wallet", changefreq: "monthly", priority: 0.5 },
 ];
 

diff --git a/src/pages/_app.tsx b/src/pages/_app.tsx
@@ -19,6 +19,7 @@ import "swagger-ui-react/swagger-ui.css";
 import "@/styles/swagger-overrides.css";
 import { Toaster } from "@/components/ui/toaster";
 import Metatags from "@/components/ui/metatags";
+import SeoFallback from "@/components/ui/seo-fallback";
 import RootLayout from "@/components/common/overall-layout/layout";
 
 // MeshProvider pulls in dependencies that assume a browser/webpack env.
@@ -94,6 +95,10 @@ const MyApp: AppType<{ session: Session | null }> = ({
         type={seo.type}
         extraJsonLd={seo.jsonLd}
       />
+      {/* Also outside the ssr:false boundary: a <noscript> content fallback so
+          crawlers and LLM fetchers that don't run our client bundle still get
+          readable body content (the app itself renders an empty shell for them). */}
+      <SeoFallback />
       <MeshProviderNoSSR>
         {umamiWebsiteId && (
           <Script

diff --git a/src/pages/llms.txt.tsx b/src/pages/llms.txt.tsx
@@ -0,0 +1,95 @@
+import type { GetServerSideProps } from "next";
+import { SITE_NAME, DEFAULT_DESCRIPTION, absoluteUrl } from "@/lib/seo";
+
+/**
+ * Serves /llms.txt — a concise, machine-readable orientation for AI agents and
+ * LLM fetchers (see llmstxt.org). The whole app is a client-only SPA, so a
+ * no-JS agent can't discover the bot API by crawling the UI; this file gives it
+ * the entry points (OpenAPI spec, downloadable skill, human docs) plus a
+ * self-contained bot quickstart so it can start calling the API immediately.
+ *
+ * Content is built from @/lib/seo so the URLs point at the canonical host of
+ * whatever deployment serves this. Keep in sync with src/pages/api/v1/README.md,
+ * which is the authoritative endpoint reference.
+ */
+export function buildLlmsTxt(): string {
+  const spec = absoluteUrl("/api/swagger");
+  const skill = absoluteUrl("/api/skill");
+  const docs = absoluteUrl("/api-docs");
+
+  return `# ${SITE_NAME}
+
+> ${DEFAULT_DESCRIPTION}
+
+${SITE_NAME} exposes a REST bot API (base path \`/api/v1\`, JSON over HTTPS) so
+autonomous agents can create wallets, co-sign transactions, delegate stake, and
+vote on Cardano governance under M-of-N approval. Every mutating call needs a bot
+JWT, and the wallet's signing threshold still applies: a bot can propose and sign,
+but funds move only once the required quorum of signatures is collected.
+
+## Start here (machine-readable)
+
+- [OpenAPI 3.0 spec](${spec}): complete, machine-readable definition of every
+  endpoint, with an absolute \`servers\` base URL. Feed this to your tooling / codegen.
+- [Agent skill (Markdown)](${skill}): a ready-to-load skill describing the full bot
+  workflow end to end — download and give it to your agent.
+- [Interactive API docs](${docs}): human Swagger UI with a wallet-based bearer-token generator.
+
+## Authentication
+
+Every bot request sends the header \`Authorization: Bearer <jwt>\`. A bot JWT is
+minted once through the onboarding flow, then refreshed via botAuth:
+
+1. POST /api/v1/botRegister — bot self-registers with \`requestedScopes\`; returns \`{ pendingBotId, claimCode }\`. Register **without** a \`paymentAddress\` — a fresh bot has no wallet yet; the address is bound later at first botAuth.
+2. POST /api/v1/botClaim — the human owner approves the \`claimCode\` using their own JWT.
+3. GET  /api/v1/botPickupSecret?pendingBotId=... — bot retrieves \`{ botKeyId, secret }\` exactly once (the secret then stays valid for repeated botAuth).
+4. POST /api/v1/botAuth — bot exchanges \`botKeyId\` + \`secret\` for a bot JWT \`{ token, botId }\`. Supply \`paymentAddress\` on the **first** botAuth to bind the bot's identity; the JWT always carries that server-bound address.
+
+Refresh by repeating step 4 (tokens expire after ~1 hour; there is no separate
+refresh endpoint). Rotate a leaked secret with POST /api/v1/botRotateSecret
+(\`{ botKeyId, secret }\` -> a new secret, returned once). Scopes:
+\`multisig:read\`, \`multisig:create\`, \`multisig:sign\`, \`governance:read\`, \`ballot:write\`.
+The \`address\` in the JWT must match the \`address\` sent in each request.
+
+Human owners authenticate differently: GET /api/v1/getNonce -> sign the nonce ->
+POST /api/v1/authSigner -> JWT.
+
+## Common endpoints
+
+Read:
+- GET /api/v1/botMe — the bot's own identity, owner address, and wallet grants.
+- GET /api/v1/walletIds?address=... — wallets the caller can access.
+- GET /api/v1/freeUtxos?walletId=...&address=... — spendable UTxOs; pass these refs (\`{ txHash, outputIndex }\`) when building transactions.
+- GET /api/v1/pendingTransactions?walletId=...&address=... — transactions awaiting signatures.
+- GET /api/v1/governanceActiveProposals — active governance proposals (scope \`governance:read\`).
+- GET /api/v1/botBallots?walletId=... — the bot's governance ballot drafts (\`ballot:write\`).
+
+Write (required scope in parentheses):
+- POST /api/v1/createWallet — create a multisig wallet (\`multisig:create\`).
+- POST /api/v1/addTransaction — submit a built tx (CBOR/JSON) for signing or queuing (\`multisig:sign\`).
+- POST /api/v1/signTransaction — add a witness; auto-submits when the threshold is met (\`multisig:sign\`).
+- POST /api/v1/botStakeCertificate — server-build a stake register/delegate/deregister tx (\`multisig:sign\`).
+- POST /api/v1/botDRepCertificate — server-build a DRep register/retire tx (\`multisig:sign\`).
+- POST /api/v1/botBallotsUpsert — record governance vote decisions + draft rationale (\`ballot:write\`; an observer grant is enough).
+
+Plutus proxy endpoints (\`/api/v1/proxy*\`) follow the same request pattern; see the OpenAPI spec.
+
+## Notes
+
+- Status: alpha — endpoints may change. The OpenAPI spec at ${spec} is the source of truth.
+- UTxO-consuming builders take references only (\`{ txHash, outputIndex }\`) from freeUtxos — never raw UTxO JSON.
+- Errors use standard HTTP status codes: 400 validation, 401 auth, 403 scope/access, 409 conflict, 429 rate limit.
+`;
+}
+
+export const getServerSideProps: GetServerSideProps = async ({ res }) => {
+  res.setHeader("Content-Type", "text/plain; charset=utf-8");
+  res.setHeader("Cache-Control", "public, max-age=3600, s-maxage=3600");
+  res.write(buildLlmsTxt());
+  res.end();
+  return { props: {} };
+};
+
+export default function LlmsTxt() {
+  return null;
+}