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fix(mcp): carry x-ratelimit headers onto MCP responses #233

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Merged
ralyodio merged 1 commit into from
Oct 21, 2026
Merged

fix(mcp): carry x-ratelimit headers onto MCP responses #233

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17 changes: 13 additions & 4 deletions apps/web/src/lib/api-meter.js
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Original file line number Diff line number Diff line change
Expand Up @@ -40,10 +40,19 @@ export async function apiMeter(c, next) {
? config.api.premiumPerHour
: config.api.anonPerHour;
const used = await q.bumpApiUsage(bucket);
c.header('x-ratelimit-limit', String(limit));
c.header('x-ratelimit-remaining', String(Math.max(0, limit - used)));
c.header('x-plan', paid ? 'crawl-pass' : plan);
if (used <= limit) return next();
const headers = {
'x-ratelimit-limit': String(limit),
'x-ratelimit-remaining': String(Math.max(0, limit - used)),
'x-plan': paid ? 'crawl-pass' : plan,
};
for (const [k, v] of Object.entries(headers)) c.header(k, v);
if (used <= limit) {
await next();
// The MCP handler answers with its own Response, which drops c.header().
for (const [k, v] of Object.entries(headers))
if (!c.res.headers.has(k)) c.res.headers.set(k, v);
return;
}

if (viaKey || paid) {
c.header('retry-after', String(HOUR));
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