diff --git a/CHANGELOG.md b/CHANGELOG.md
index 42a0666..fe0c0e9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,24 @@
 # Changelog
 
+## 0.53.1
+
+### Fixed — seedance-2.5 first-and-last-frame is refused by name on Solana
+
+0.53.0 advertised `last_frame_url` on seedance-2.5 on every rail.
+`sol.blockrun.ai` is a separate deploy that has not added 2.5 to its
+first-and-last-frame list: it answers `400 "does not support first-and-last-frame
+video"` before quoting, while `blockrun.ai` quotes the same body (unsigned
+probes, 2026-09-29; 2.0, 2.0-fast, 2.0-mini and 1.5-pro quote on both). No
+payment was ever at risk, but the caller got "the endpoint did not return a
+quote". The tool now refuses that one combination on the Solana wallet rail,
+names Base and the account rail as the places that serve it, and lists the
+models that work on Solana. The parameter description and
+`docs/seedance-capabilities.md` say the same.
+
+The output controls (`output_format`, `bitrate_mode`, `watermark`,
+`return_last_frame`) were probed on both gateways as well. Both validate them
+in their request schemas, so they are not silently dropped on Solana.
+
 ## 0.53.0
 
 ### Added — Seedance reference media, 2.5 first/last frame, output controls
diff --git a/README.md b/README.md
index b62032e..91c7bab 100644
--- a/README.md
+++ b/README.md
@@ -252,9 +252,9 @@ Package managers have shown install size for decades. Almost no MCP server shows
 
 | Profile | Tools | Context |
 |---------|-------|---------|
-| `full` *(default)* | 19 | 14,000 |
+| `full` *(default)* | 19 | 14,011 |
 | `trading` | 8 | 5,411 |
-| `media` | 7 | 6,784 |
+| `media` | 7 | 6,795 |
 | `research` | 5 | 2,752 |
 | `chat` | 3 | 2,079 |
 
diff --git a/VERSION b/VERSION
index 7f422a1..3f99a6d 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.53.0
+0.53.1
diff --git a/docs/mcp-schema-overhead.md b/docs/mcp-schema-overhead.md
index 86b3cf2..d60cb2d 100644
--- a/docs/mcp-schema-overhead.md
+++ b/docs/mcp-schema-overhead.md
@@ -16,9 +16,9 @@ Written 2026-09-01, verified against `@modelcontextprotocol/sdk` 1.29.0. Numbers
 
 | Profile | Tools | Context |
 |---------|-------|---------|
-| `full` *(default)* | 19 | 14,000 |
+| `full` *(default)* | 19 | 14,011 |
 | `trading` | 8 | 5,411 |
-| `media` | 7 | 6,784 |
+| `media` | 7 | 6,795 |
 | `research` | 5 | 2,752 |
 | `chat` | 3 | 2,079 |
 
diff --git a/docs/seedance-capabilities.md b/docs/seedance-capabilities.md
index 1141716..f12e8f4 100644
--- a/docs/seedance-capabilities.md
+++ b/docs/seedance-capabilities.md
@@ -23,7 +23,8 @@ Both wallet gateways refuse them with a `400` **before** issuing a quote
 `blockrun_video` refuses them client-side on the wallet rails rather than
 forwarding a request that cannot succeed, so no payment is taken and no DNS
 lookup is spent on the reference URLs. Frame seeding (`image_url`,
-`last_frame_url`) is unaffected and works on every rail.
+`last_frame_url`) is unaffected and works on every rail, with one exception
+below.
 
 ## Supported combinations
 
@@ -31,7 +32,13 @@ lookup is spent on the reference URLs. Frame seeding (`image_url`,
 | --- | --- | --- | --- |
 | Seedance 1.5-pro | Yes | No | No |
 | Seedance 2.0 / 2.0-fast / 2.0-mini | Yes | 1–9 | Image + video, image + audio, video + audio, or all three; 1–3 clips of each type |
-| Seedance 2.5 | Yes | 1–30 | No |
+| Seedance 2.5 | Yes, except on the Solana wallet rail | 1–30 | No |
+
+`sol.blockrun.ai` has not yet added 2.5 to its first-and-last-frame list. It
+refuses `last_frame_url` on 2.5 with a `400` before quoting, while
+`blockrun.ai` quotes the same body; 2.0, 2.0-fast, 2.0-mini and 1.5-pro quote
+on both (unsigned probes, 2026-09-29). The tool refuses that one combination on
+Solana by name, so no payment is taken; use Base or the account rail for it.
 
 Seedance 2.5 takes reference **images** but no reference clips — the gateway
 registry carries `supportsReferenceImages: true` with
diff --git a/package.json b/package.json
index 23d178d..ea27121 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@blockrun/mcp",
-  "version": "0.53.0",
+  "version": "0.53.1",
   "mcpName": "io.github.BlockRunAI/blockrun-mcp",
   "description": "BlockRun MCP Server - Give your AI agent web search, deep research, prediction markets, and crypto data. Pay per call from a USDC wallet (Solana or Base) or a BlockRun API key.",
   "type": "module",
diff --git a/src/tools/video.ts b/src/tools/video.ts
index a8f1763..7392dcb 100644
--- a/src/tools/video.ts
+++ b/src/tools/video.ts
@@ -428,7 +428,7 @@ Returns a permanent blockrun-hosted video URL (the gateway mirrors the asset to
         generate_audio: z.boolean().optional().describe("Seedance only: whether to generate a synced audio track. Defaults ON for text-to-video and OFF for image/RealFace-conditioned. The auto-generated audio is occasionally rejected by upstream moderation ('output audio may contain sensitive information') even for benign prompts — pass false to skip audio and avoid that failure. Ignored by xAI/Sora."),
         resolution: z.enum(["480p", "720p", "1080p", "4K"]).optional().describe("Output resolution. Seedance defaults to 720p and is token-priced (~2.25x at 1080p, ~9x at 4K); per-model sets from token360's published schema: seedance-2.0 480p/720p/1080p/4K · 1.5-pro 480p/720p/1080p · 2.0-fast, 2.0-mini and 2.5 480p/720p only. grok-imagine-video honours 480p (default, $0.05/sec) and 720p ($0.07/sec) and rejects anything higher. Ignored by Sora only (dropped from the request)."),
         aspect_ratio: z.enum(["adaptive", "16:9", "9:16", "1:1", "4:3", "3:4", "21:9"]).optional().describe("Output aspect ratio. Seedance honors the full set; Sora uses it only to pick portrait vs landscape (9:16 / 3:4 -> portrait); Grok ignores it (the gateway never forwards it to xAI). Defaults to the model's own default. (9:21 removed 2026-08-07 — no Seedance model offers it; use 9:16 for vertical.)"),
-        last_frame_url: z.string().url().optional().describe("Seedance 1.5-pro / 2.0 / 2.0-fast / 2.0-mini / 2.5: first-and-last-frame interpolation. A second image URL that seeds the FINAL frame so the model tweens from image_url (first frame) → last_frame_url (last frame). Requires image_url; mutually exclusive with real_face_asset_id."),
+        last_frame_url: z.string().url().optional().describe("Seedance 1.5-pro / 2.0 / 2.0-fast / 2.0-mini / 2.5 (2.5 not on the Solana wallet rail): first-and-last-frame interpolation. A second image URL that seeds the FINAL frame so the model tweens from image_url (first frame) → last_frame_url (last frame). Requires image_url; mutually exclusive with real_face_asset_id."),
         model: z.enum(["azure/sora-2", "xai/grok-imagine-video", "bytedance/seedance-1.5-pro", "bytedance/seedance-2.0-mini", "bytedance/seedance-2.0-fast", "bytedance/seedance-2.0", "bytedance/seedance-2.5"]).optional().default("xai/grok-imagine-video").describe("Video model to use"),
         reference_image_urls: z.array(z.string().url().max(2048)).min(1).max(30).optional().describe("ACCOUNT RAIL ONLY (BLOCKRUN_API_KEY) — the Base and Solana gateways refuse reference media with a 400. Character/style reference images, cited as 'image 1', 'image 2' in the prompt: up to 9 on seedance-2.0 / 2.0-fast / 2.0-mini, 30 on 2.5. Mutually exclusive with image_url / last_frame_url / real_face_asset_id."),
         reference_videos: z.array(z.object({ url: z.string().url().max(2048) })).min(1).max(3).optional().describe("ACCOUNT RAIL ONLY. Motion reference clips (1-3) on seedance-2.0 / 2.0-fast / 2.0-mini — NOT 2.5. Each clip is BILLED AT THE 15.2s CEILING whatever its real length, so one clip makes a 5s 720p render cost about 4x (seedance-2.0-mini ~$0.40 -> ~$1.61), and more at 480p."),
@@ -491,7 +491,7 @@ Returns a permanent blockrun-hosted video URL (the gateway mirrors the asset to
         // then that frame seeds and references do not mix, and only then that
         // the rail cannot serve it at all.
         if (refs && !isApiKeyMode()) {
-          return reject(`Reference media (reference_image_urls / reference_videos / reference_audios) is served only by the BlockRun account rail (api.blockrun.ai). The Base and Solana gateways refuse it with a 400 before quoting. Set BLOCKRUN_API_KEY to use the account rail, or drop the reference fields — image_url / last_frame_url frame seeding works on every rail. No payment was taken.`);
+          return reject(`Reference media (reference_image_urls / reference_videos / reference_audios) is served only by the BlockRun account rail (api.blockrun.ai). The Base and Solana gateways refuse it with a 400 before quoting. Set BLOCKRUN_API_KEY to use the account rail, or drop the reference fields — image_url / last_frame_url frame seeding works on the wallet rails. No payment was taken.`);
         }
 
         // Second for the same reason: with references present, every
@@ -530,6 +530,15 @@ Returns a permanent blockrun-hosted video URL (the gateway mirrors the asset to
               isError: true,
             };
           }
+          // sol.blockrun.ai is a separate deploy and has not taken 2.5 into
+          // its first-and-last-frame list: it answers 400 "does not support
+          // first-and-last-frame video" before quoting, where Base quotes the
+          // same body (both probed unsigned 2026-09-29; 2.0 / 2.0-fast /
+          // 2.0-mini / 1.5-pro quote on both). Refused here by name instead
+          // of surfacing as "the endpoint did not return a quote".
+          if (selectedModel === SEEDANCE_25 && !isApiKeyMode() && getChain() === "solana") {
+            return reject(`${SEEDANCE_25} first-and-last-frame (last_frame_url) is not served by the Solana gateway yet — it refuses the request before quoting. Use it on Base (blockrun_wallet action:"chain" chain:"base") or the account rail (BLOCKRUN_API_KEY), or pick ${[...FIRST_LAST_FRAME_MODELS].filter((m) => m !== SEEDANCE_25).join(", ")}, which support it on Solana. No payment was taken.`);
+          }
           if (!image_url) {
             return {
               content: [{ type: "text", text: formatError("last_frame_url (first-and-last-frame interpolation) requires image_url as the first frame.") }],
diff --git a/test/video-reference-media.test.ts b/test/video-reference-media.test.ts
index d7f899b..0be8f15 100644
--- a/test/video-reference-media.test.ts
+++ b/test/video-reference-media.test.ts
@@ -516,3 +516,36 @@ test("the reference_videos description gives the real multiple, not the old form
   assert.doesNotMatch(d, /triples/);
   assert.match(d, /about 4x/);
 });
+
+test("2.5 first-and-last-frame is refused by name on the Solana wallet rail, and only there", async () => {
+  // sol.blockrun.ai answers 400 "does not support first-and-last-frame video"
+  // for 2.5 before quoting; Base quotes it (unsigned probes, 2026-09-29).
+  const args = { prompt: "t", model: "bytedance/seedance-2.5", image_url: IMG, last_frame_url: IMG };
+  apiKeyMode = false;
+  activeChain = "solana";
+  try {
+    const text = await errorText(args);
+    assert.match(text, /not served by the Solana gateway/);
+    assert.match(text, /No payment was taken/);
+    // The other first-and-last-frame models are served on Solana: the guard
+    // must not catch them.
+    for (const model of ["bytedance/seedance-2.0", "bytedance/seedance-2.0-mini", "bytedance/seedance-1.5-pro"]) {
+      const res = await makeHarness().call({ ...args, model });
+      const t = res.content.map((c: any) => c.text).join("\n");
+      assert.doesNotMatch(t, /not served by the Solana gateway/, model);
+    }
+  } finally {
+    apiKeyMode = true;
+    activeChain = "base";
+  }
+  // Base and the account rail still forward it.
+  apiKeyMode = false;
+  try {
+    const body = await bodySentFor(args);
+    assert.equal(body.last_frame_url, IMG);
+  } finally {
+    apiKeyMode = true;
+  }
+  const body = await bodySentFor(args);
+  assert.equal(body.last_frame_url, IMG);
+});