Blog
Research from the Agent Economy Price Index (AEPI).
2026-09-29
AEPI edged to 100.484 (+0.005% day-over-day; may round to flat) while like-for-like coverage climbed to 9,938 pairs (+66). Three published moves — CosVoice Pro up about a third, LinkedMash Lifetime up about a quarter, CosVoice Plus mid-teens — and a soft headline: loud cards, quiet chain.
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2026-09-28
AEPI printed a dead-flat 100.479 (0.00% day-over-day) while like-for-like coverage jumped to 9,872 pairs (+627). Zero published genuine moves (317 held) — a coverage day, not a reprice day: every delivery scope held its level; Skills & plugins still lead the 30-day window on a thin cohort.
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2026-09-28
Needle Pro published a −65% cut to $69/agent/mo (yearly-billed), while Proofable Pro and Voice AI Veterinary Starter lifted 50–60%, and 22 September briefly broke the priced chain with no published release. Agent Costs’ week-ending note: watch standing series and billing period, not the loudest card.
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2026-09-25
AEPI edged to 100.46 (+0.002% day-over-day; rounds to flat) while like-for-like coverage rebounded to 8,900 pairs. Five published moves — End of Life Starter up about an eighth, three small GReminders euro bumps, Mailchimp Standard a half-percent tick — and a flat headline: coverage recovered, the index barely moved.
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2026-09-24
AEPI edged to 100.458 (+0.003% day-over-day; rounds to flat) while like-for-like coverage slipped to 8,784 pairs. Six published moves — PostNitro Creator and Team up a fifth, Cheapest Inference Core up about a fifth, Flagship and Blooio Inbound down — and a flat headline: loud cards still do not make a loud index.
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2026-09-23
AEPI eased to 100.455 (−0.037% day-over-day; about −0.04% rounded) while like-for-like coverage rose to 8,899 pairs on the v2 ledger. Three published plan cuts — led by Needle Pro down about two-thirds — and a soft headline: three loud cards still do not make a loud index.
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2026-09-22
AEPI finished near flat at 100.348 (+0.002% day-over-day; public card 0.00%) while like-for-like coverage rose to 7,738 pairs. One published plan change — Logistify Starter up about a fifth — and a quiet headline: one loud card still does not make a loud index.
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2026-09-21
AEPI eased to 100.351 (−0.03% day-over-day) while like-for-like coverage rose to 7,706 pairs. Five published plan changes — led by deep ThreatCluster MCP cuts — and a soft headline: one loud card still does not make a loud index.
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2026-09-21
ThreatCluster MCP cut Growth from $99 to $29 and Starter from $19.99 to $7.99, while Context.dev’s cheaper page prices look like promos — and 21 September’s scan left dozens of listings blank. Agent Costs’ week-ending note: watch the plan series, not the loudest card.
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2026-09-21
A monthly look back at how the agent economy is priced, from the pages themselves. Subscriptions held their majority in every category; usage pricing grew through discovery and one hosting template rather than vendors switching; matched subscription prices rose about 0.27%; and usage-priced tools cluster together on the semantic map at more than twice chance.
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2026-09-18
The AEPI closed the 18 September observation at 100.367 (about −0.005% day-over-day) with like-for-like coverage at 7,355 pairs. Eight published repricings: one business plan cut in half, one starter plan up two-fifths; APIs remain the strongest 30-day riser.
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2026-09-17
The AEPI closed the 17 September observation at 100.354 (+0.037% day-over-day) with like-for-like coverage at 7,357 pairs. One provider lifted all three of its published plans by 20%; APIs remain the strongest 30-day riser.
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2026-09-15
The AEPI closed the 15 September observation at 100.34 (+0.016% day-over-day) with like-for-like coverage up again to 7,359 pairs. Two published repricings from a single provider drove the day; APIs remain the strongest 30-day riser.
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2026-09-03
The AEPI, Agents and MCPs indices all closed at all-time highs on the same day — and the 3-day signal our research note tested against SPY is the second-strongest ever. If the relationship holds, the next few trading days get interesting. We'll grade the call either way.
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2026-09-02
The agentic-economy price index closed at 100.22 today — its highest since records began in July. One provider repriced every plan up more than 100% to drive the move, while enterprise tiers keep leading.
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2026-08-30
A preliminary research note: 3-day AEPI moves were positively correlated with later SPY and AIQ returns — composite beats components, full-day gap, exploratory. Full paper inside.
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28 August 2026
We tested three embedding models, four text templates and two judge models against labelled ground truth. What we changed: nothing — and the numbers behind why that's the right answer.
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25 August 2026
A 31-day like-for-like study across ~16,000 listed agents, MCP servers, APIs and platforms: enterprise-tier prices rose nine times faster than Pro.
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Daily market notes
Generated each morning from that day's observed repricings.