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Accelerometer Delta — AI-Progress Series Comparison
x402
Accelerometer Delta — AI-Progress Series Comparison is a paid API for AI agents from x402-accelerometer-feed.fly.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-17).
Returns the absolute and percentage change between two dated snapshots across 129 AI-progress and technology time series, showing per-source from/to values and whether new observations landed
Price / call$0.01
Success—
StatusUnknown
How this service works
What changed between two dated snapshots of 129 AI-progress and technology series: per source the from/to values and dates, absolute and % change, and whether a new observation landed. Covers frontier benchmark scores, compute trends, AGI prediction-market odds, model pricing, AI stocks and crypto, energy, space, robotics, research output. Ids are YYYY-MM-DD from the free menu at /. No composite score.
Output
A JSON object of kind 'delta' containing: the from and to snapshot identifiers, n_sources (129), n_moved (count of series with a newer observation in the 'to' snapshot), and a 'sources' array where each element includes the series id, domain, metric, unit, from object (value + date), to object (value + date), delta_abs, delta_pct, and a new_observation boolean. The composite field is always null.
Example use cases
Quarterly AI benchmark progress review
“Compare the Accelerometer AI-progress snapshots from 2024-01-01 to 2024-04-01 and tell me which frontier benchmark scores moved the most in absolute and percentage terms.”
AGI market odds shift monitoring
“What happened to AGI prediction-market odds and AI model pricing between the 2023-12-01 and 2024-06-01 Accelerometer snapshots? Show me the per-source deltas and flag any series that got a fresh observation.”
Compute and energy trend delta briefing
“Pull the Accelerometer delta between 2024-03-01 and 2024-09-01 and summarize how compute trends and energy metrics changed — I want absolute change, percent change, and whether any of those series logged a new data point.”
Technical details
Endpoint
GEThttps://x402-accelerometer-feed.fly.dev/delta/:from/:toWhen to prefer
Use this endpoint when you need to quantify how AI-progress metrics, benchmark scores, compute trends, model pricing, or related technology series have shifted between two specific points in time. It is the right choice when you want per-source breakdowns with both absolute and percentage changes and a flag for newly landed observations. Prefer it over the latest-snapshot or single-snapshot endpoints when your goal is comparative analysis or trend measurement across a time window rather than a point-in-time reading.
Side effects
- Invalid or non-existent snapshot date IDs return an error or empty result — valid IDs must be obtained from the free menu at /
- 'from' date later than 'to' date may return zero or negative deltas without an explicit error
- Payment not included or insufficient (requires $0.01 USDC via x402 protocol) results in a 402 Payment Required response
- Network timeout if the fly.dev instance is cold-starting
- Missing path parameters (:from or :to) result in a routing error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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