← The evidence ledger
Evidence row 2204715
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://x402-accelerometer-feed.fly.dev/ai-progress/latest
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 26830e72a8b1b1c61bc8db98623c9981a4ce51c2c39e3e2b686653d054f2e398
- Leaf
- 0xa8ea5cb5f830b899c9867d37c5064101708a4a11c6f3b730e0caeb5eef644e85
What was observed
{
"endpoints": [
[
"x402",
"https://x402-accelerometer-feed.fly.dev/ai-progress/latest"
]
],
"name": "Accelerometer",
"owner_address": "0xbc3a8eac0601f717e803935cabedee8edb7713c4",
"raw": {
"accepts": [
{
"amount": "5000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xbC3A8eAc0601F717E803935cABEDeE8EDB7713C4",
"scheme": "exact"
},
{
"amount": "5000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww"
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "5dBE1vqMVJCbxpBv9kw9nQJguUhYXk5mRGVfsxEF9cc4",
"scheme": "exact"
}
],
"description": "Use this when you need the current state of AI progress in one call: the latest reading of 129 public series (frontier benchmark scores GPQA/HLE/ARC-AGI/METR, Epoch compute trends, AGI odds on Polymarket/Manifold/Kalshi, model pricing, AI stocks and crypto, energy, space, robotics, biomed, research output). One JSON row per series: latest and previous value with dates, % change, signal quality, source URL. Free 3-row sample at /preview.",
"extensions": {
"bazaar": {
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"input": {
"method": "GET",
"queryParams": {},
"type": "http"
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"example": {
"composite": null,
"composite_note": "No cross-source composite is offered. Each row is one source's latest observation as pulled at run_at, with its previous observation and the % change between them.",
"domains": [
"agents",
"autonomy",
"benchmarks",
"biomed",
"capital",
"compute",
"crypto",
"ecosystem",
"energy",
"industrial",
"inference",
"macro",
"markets",
"narrative",
"patents",
"prediction",
"pricing",
"research",
"robotics",
"science",
"space"
],
"emitted_at": "2026-09-20T17:13:00+00:00",
"n_sources": 129,
"n_sources_ok": 117,
"run_at": "2026-09-20T17:00:04.505567+00:00",
"schema_version": "0.2",
"snapshot_id": "2026-09-20",
"sources": [
{
"access": "free_api",
"cadence": "weekly survey, accumulating",
"confidence": "verified",
"delta_pct_vs_previous": -1.082,
"domain": "agents",
"first_date": "2026-04-21",
"id": "agents.x402_services_count",
"latest": 2834,
"latest_date": "2026-09-20",
"metric": "x402 pay-per-request services (agentic.market)",
"n_points": 10,
"previous": 2865,
"previous_date": "2026-09-16",
"signal_quality": "strong",
"unit": "count",
"url": "https://agentic.market"
},
{
"access": "dataset_download",
"cadence": "updated as METR re-fits new models",
"confidence": "verified",
"delta_pct_vs_previous": 106.9667,
"domain": "autonomy",
"first_date": "2019-02-14",
"id": "autonomy.metr_time_horizon_50",
"latest": 112.230447,
"latest_date": "2025-04-16",
"metric": "METR frontier task-completion horizon @50% (minutes)",
"n_points": 15,
"previous": 54.226342,
"previous_date": "2025-02-24",
"signal_quality": "strong",
"unit": "minutes",
"url": "https://github.com/METR/cross-domain-horizon (data/external/logistic_fits/headline.csv; METR 'Measuring AI Ability to Complete Long Tasks', metr.org/blog/2025-03-19-measuring-ai-ability-to-complete-long-tasks/)"
}
],
"stub": false
},
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},
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},
"n_sources": {
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"run_at": {
"description": "ISO timestamp the pull ran",
"type": "string"
},
"schema_version": {
"type": "string"
},
"snapshot_id": {
"description": "YYYY-MM-DD of the pull",
"type": "string"
},
"sources": {
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"null"
]
},
"cadence": {
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"null"
]
},
"confidence": {
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},
"delta_pct_vs_previous": {
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]
},
"domain": {
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},
"first_date": {
"type": "string"
},
"id": {
"description": "registry key, e.g. epoch.training_flop_max",
"type": "string"
},
"latest": {
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},
"latest_date": {
"type": "string"
},
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},
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},
"previous": {
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]
},
"previous_date": {
"type": [
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"null"
]
},
"signal_quality": {
"description": "strong | moderate | weak | noisy",
"type": "string"
},
"unit": {
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"url": {
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]
}
},
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},
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},
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},
"offer-receipt": {
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"signature": "eyJhbGciOiJFZERTQSIsImtpZCI6ImRpZDp3ZWI6eDQwMi1hY2NlbGVyb21ldGVyLWZlZWQuZmx5LmRldiNyZWNlaXB0LTEifQ.eyJhbW91bnQiOiI1MDAwIiwiYXNzZXQiOiIweDgzMzU4OWZDRDZlRGI2RTA4ZjRjN0MzMkQ0ZjcxYjU0YmRBMDI5MTMiLCJuZXR3b3JrIjoiZWlwMTU1Ojg0NTMiLCJwYXlUbyI6IjB4YkMzQThlQWMwNjAxRjcxN0U4MDM5MzVjQUJFRGVFOEVEQjc3MTNDNCIsInJlc291cmNlVXJsIjoiaHR0cHM6Ly94NDAyLWFjY2VsZXJvbWV0ZXItZmVlZC5mbHkuZGV2L2FpLXByb2dyZXNzL2xhdGVzdCIsInNjaGVtZSI6ImV4YWN0IiwidmFsaWRVbnRpbCI6MTc5MzU5NTIwNiwidmVyc2lvbiI6MX0.yfUpEAaetewqEAq9lZ9LHv-D2AUWS7zHk-IwrCtPajYcDRWOY8wpUtpOueT76HK_qKbJNBsALO1mXkHsKoEHBQ"
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},
"lastUpdated": "2026-11-02T04:48:26.274Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-11-02T04:48:26.037Z"
},
"resource": "https://x402-accelerometer-feed.fly.dev/ai-progress/latest",
"serviceName": "Accelerometer",
"tags": [
"ai-progress",
"agi",
"benchmarks",
"prediction-markets",
"time-series"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Use this when you need the current state of AI progress in one call: the latest reading of 129 public series (frontier benchmark scores GPQA/HLE/ARC-AGI/METR, Epoch compute trends, AGI odds on Polymarket/Manifold/Kalshi, model pricing, AI stocks and crypto, energy, space, robotics, biomed, research output). One JSON row per series: latest and previous value with dates, % change, signal quality, source URL. Free 3-row sample at /preview."
}What the leaf hashes
{"body":"26830e72a8b1b1c61bc8db98623c9981a4ce51c2c39e3e2b686653d054f2e398","id":2204715,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646928412708,"prev":null,"subject":"x402_bazaar:https://x402-accelerometer-feed.fly.dev/ai-progress/latest","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
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- 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af