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P0 Agent Economy Index – /concentration
x402
P0 Agent Economy Index – /concentration is a paid API for AI agents from x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-13).
Returns market concentration metrics (HHI, top-seller shares, payer bounds) for x402 services grouped by tag, sourced from live 30-day payment data
Price / call$0.002
Success—
StatusUnknown
How this service works
An open index of the machine-to-machine (agent) economy. x402 routes: ranked discovery over the live x402 service market, every indexed service scored by real 30-day calls and paying-wallet bounds, with a receipt naming the snapshot hash and scoring revision. /economy routes, for Tempo MPP, Virtuals ACP, Olas, Masumi, ERC-8004 agent registries, Solana agent registries, Base agent contracts and MCP servers (Official MCP Registry): each protocol's published figures (agent or server counts, transactions or payment events; payers and USD volume only where the source publishes them: payers for x402 and Tempo MPP, USD volume for x402 and Virtuals ACP), each with its unit, window and source; units differ, so totals are not summed. L402 and per-service MPP listings are not covered.
Output
A JSON object with per-tag concentration metrics including HHI, top-1 and top-3 payer share, top-1 seller share, total services and sellers, zero-payer service count, an upper-bound sum of unique payers, and a ranked list of top resources with their 30-day payer counts. Includes snapshot timestamp, staleness flag, data source attribution, and a note clarifying that payer sums are upper bounds.
Example use cases
Competitive landscape check for x402 AI services
“I'm evaluating the x402 ecosystem for AI-tagged services — can you get me the concentration metrics showing HHI, top-3 share, and how many sellers are active so I understand how competitive or monopolized that segment is?”
Finding dominant x402 services in a niche
“What are the top x402 services in the 'market data' tag ranked by paying wallets over the last 30 days, and what share of payers does the leading service capture?”
Broad x402 market overview by category
“Give me a breakdown of concentration across all the top x402 tags — I want to see which categories have the most services and sellers and which ones are dominated by just one or two players.”
Technical details
Endpoint
GEThttps://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/concentration?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need market structure analytics for the x402 service economy — specifically concentration metrics like HHI and seller share — rather than just a ranked list of services. Prefer it over the ranked-listing endpoints when the user wants to understand competitive dynamics, monopoly risk, or category diversity rather than finding the best individual service to call.
Side effects
- Stale snapshot: stale:true returned if the underlying index hasn't refreshed within expected window, snapshot_age_s will be large
- Unknown tag: returns empty categories array if the provided tag has no indexed services
- Invalid tag format: malformed or unsupported tag strings may return empty results or a 400-level error
- Service unavailable: Cloudflare Worker cold start or upstream Bazaar catalog unavailability may cause timeout or 5xx
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"v": 1,
"tag": null,
"note": "payers_sum is an upper bound of unique payers in a tag. Format sample: totals, coverage, cohorts and per-chain rows are our real computation of 2026-10-05; per-tag, per-service and per-pair list entries are illustrative placeholders.",
"as_of": "2026-10-04T18:24:44+00:00",
"stale": false,
"labels": {
"calls_30d": "calls_30d are paid outcomes: settlements recorded by the CDP facilitator. Unpaid invocations (402 challenges, probes, failed verifies) are not observable in public data, so invocations is null.",
"invocations": null,
"paid_outcome": "a facilitator-recorded settlement (catalog calls_30d) or an on-chain transfer to a listed payTo address (scans, not verified as x402 settlements)"
},
"source": "P0 demand metrics: Coinbase CDP x402 Bazaar catalog (public) + P0 on-chain scans of USDC transfers to listed x402 payTo addresses",
"categories": [
{
"hhi": 0.2311,
"tag": "example-tag",
"top": [
{
"resource": "https://api.example-seller.dev/v1/search",
"payers30d": 130
}
],
"sellers": 4,
"services": 12,
"top1_share": 0.4194,
"top3_share": 0.7742,
"top1_seller_share": 0.5161,
"zero_payer_services": 3,
"payers_sum_upper_bound": 310
}
],
"source_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
"generated_at": "2026-10-05T00:30:00Z",
"snapshot_age_s": 600,
"categories_total": 5001
}
}Tags
x402
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