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PromptLayer Observability

Built by Feature Forge · 2026-04-17

PromptLayer replacement. Prompt registry with version diff + A/B traffic split without the $50/month Pro tier — metered per tracked request and per registry fetch, free version diffs. Built on MeterCall.

prompt-registry ab-traffic version-diff per-tracked-req
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'; runEl.disabled = true; fetch('https://metercall-claude.patrickjameslinden.workers.dev', { method: 'POST', headers: { 'Content-Type': 'application/json', 'X-MC-Token': (window.__mcToken || '') }, body: JSON.stringify({ prompt: prompt, module_id: slug, history: history }) }).then(async function(res){ if (!res.ok) throw new Error('gateway_'+res.status); var reader = res.body.getReader(); var decoder = new TextDecoder(); var buf = ''; var acc = ''; var last = 0; while (true) { var chunk = await reader.read(); if (chunk.done) break; buf += decoder.decode(chunk.value, {stream:true}); var parts = buf.split('\n\n'); buf = parts.pop(); for (var i=0;i 400 && acc.indexOf('/, '').trim(); if (htmlPart.indexOf(' 20) history.splice(0, history.length - 20); runEl.disabled = false; }).catch(function(err){ statusEl.textContent = 'Error: ' + err.message + ' — try again.'; runEl.disabled = false; }); } })();