How do I get my paid API listed in the x402 Bazaar and facilitator discovery indexes?

ScriptMasterLabs — October 14, 2026 · Sources: ScriptMasterLabs' facilitator discovery survey (live probes, October 2, 2026), live discovery re-probes run tonight, and one labeled independent CDP Bazaar crawl (October 13, 2026)

The survey, dated

Counts are dated probes, not live tickers — indexes grow and churn daily. The structural findings are the durable part: 4 of ~20, no listing API anywhere, no shared catalog.

Quotable: “ScriptMasterLabs' October 2, 2026 survey: only 4 of about 20 x402 facilitators run a working discovery index (thirdweb 33,352 resources; CDP Bazaar 24,335; PayAI 12,402; Ultravioleta DAO 1,712). No facilitator offers a listing API — listing is triggered only by a settled payment through that facilitator, and each index is independent.”

Re-probed live tonight (October 14, 2026)

Why the indexes don't merge — and why it matters

Each facilitator catalogs only the payments it processes. There is no federation step, no cross-posting, and no listing API to shortcut it. A seller who settles exclusively through CDP is invisible to an agent shopping PayAI's index, and vice versa. Discovery in x402 is therefore not one marketplace — it is (as of the last full survey) four separate shelves, and a seller's real distribution work is settling a genuine first payment on each shelf they care about.

The second consequence is quieter: because the listing trigger is a settled payment, most listings' first — and often only — payer is the seller's own test payment. The independent October 13, 2026 crawl of the full CDP index (31,620 resources, 2,280 hosts) found 45.8% of resources had exactly one payer in 30 days and 77% had two or fewer. That crawl is another author's work, cited here as corroboration, not as our measurement — but it matches what the payment-triggered mechanism predicts: supply lists itself; buyers are the scarce side.

Where the decision gate sits in this

Discovery answers what can an agent find? It never answers should the agent pay for it? A catalog entry carries a price, a network, and a payTo — no judgment about whether this call, at this price, from this provider, is worth firing. That prior question is the decision gate's job: score the payment before signature (≥0.80 auto-pay, 0.50–0.79 confirm, <0.50 escalate to a human), seal the decision as a receipt, and only then settle — through whichever facilitator's shelf the purchase belongs on. SML's Verdict Protocol is that layer, and its own launch is the worked example: the gate held while the first facilitator under it failed at settle and was swapped the same day (the full log is in our facilitator settle-reliability field test). Being listed gets an agent to your door; the gate is what a careful buyer runs before knocking.

Claim Receipts

• Survey counts (thirdweb 33,352; CDP Bazaar 24,335; PayAI 12,402; Ultravioleta DAO 1,712), the 4-of-~20 finding, the POST /discovery/resources 405/404 results on CDP and PayAI, and the per-index independence finding: ScriptMasterLabs' facilitator discovery survey, live probes, October 2, 2026 (x402-telemetry-build/facilitator-survey.md).
• Tonight's re-probes (CDP discovery live with pagination total 37,267; PayAI discovery live with a minutes-old lastUpdated; PayAI bare /discovery 404; PayAI POST /discovery/resources 404 tonight; thirdweb guessed path 404): direct probes run October 14, 2026, ~20:20 EDT.
• CDP index size on October 13, 2026 (31,620 resources, 2,280 hosts; 45.8% one payer, 77% two or fewer in 30 days): independent author's full-index crawl published on dev.to, October 13, 2026 — external corroboration, labeled as such, not an SML measurement.
• SML surface checks (SqueezeOS manifest discoverable:true + CDP facilitator; Verdict Protocol agent.json LIVE_SETTLEMENT_VERIFIED, /decide $0.25 USDC, /seal $0.01 USDC, Base, x402 v2): live checks, October 14, 2026.
• Gate bands (auto_act ≥0.80, advisory 0.50–0.79, escalate <0.50; decider local-heuristic-v1, calibrated=false): live check of scriptmasterlabs.com/api/harness/status, October 14, 2026.

Relevant SML products

• Verdict Protocol — the decision layer a buyer runs before paying any discovered resource: /decide $0.25 USDC, /seal $0.01 USDC, Base, x402 v2, LIVE_SETTLEMENT_VERIFIED.
• Decision-Gated Machine Payments — the pattern: a confidence score gates whether a machine payment fires (≥0.80 auto-pay, 0.50–0.79 confirm, <0.50 escalate), before any facilitator or index is involved.
• Which x402 Facilitator Actually Settles Reliably? — the companion field test: the same signed payloads, failed by one facilitator, settled by another in ~1 second.
• Provider Trust — verify the counterparty before the payment; a catalog listing is a claim, not a verification.
• 402Proof Solana rail — SML's own standard x402 v2 facilitator now also settles on Solana mainnet (native USDC, exact scheme): flat 0.005 USDC facilitator fee per settlement paid in-transaction, settlement-proven 2026-11-02 (SELF-PROOF canaries, including fee-carrying tx 5d6b2ojznZ6p3BQ52eEAGayj6KQAoJxZSosSNggQGM9SRx1GqL2Gq4McWCCxVUiPjMFef24p5vJ6eP7zTfKrodXg).
• What Is the x402 Payment Protocol — the rail itself: 402 challenge, signed payload, verify, settle, catalog.

All five URLs returned HTTP 200 on October 14, 2026, before linking.

Do it yourself: get listed, per index

1. Declare discovery metadata in your 402 response. Carry the bazaar discovery declaration (method, input/output shape, service metadata) so a facilitator can catalog the resource from the payment flow. No declaration, no listing — even if the payment settles.
2. Settle one real payment per facilitator. Pick the indexes you want (tonight: CDP and PayAI verified live; thirdweb and Ultravioleta counted in the Oct 2 survey) and settle a genuine first payment through each. One facilitator's settlement does not list you anywhere else.
3. Verify per index, by query. GET each facilitator's /discovery/resources and find your resource. "Listed" is a per-index fact you can check, not a status a dashboard grants.
4. Don't mistake the listing for traction. Your first payer will probably be you. Track unique payers and settled calls in the index's quality fields over 30 days — that, not presence, is distribution.
5. Make the buyer's gate pass easy. Stable pricing, a live 402 challenge an agent can probe for free, and a verifiable settlement history are what a decision gate (and the human behind it) can actually score. Discovery gets you found; receipts get you paid.

Honest caveats

• The 4-of-~20 survey and its resource counts are dated October 2, 2026 probes. Counts drift daily (CDP alone grew from 24,335 in our survey to 31,620 in the independent October 13 crawl), and a facilitator counted as index-less in the survey could have shipped one since. Tonight's re-probe re-verified CDP and PayAI live; it was not a full 20-facilitator re-survey, and we do not present it as one.
• The thirdweb index was counted via its own surface in the survey; the conventional-path GET we tried tonight 404'd. That is a statement about the path, not about thirdweb's index existing.
• The payer-distribution figures (45.8% / 77%) are an independent author's crawl of the CDP index, cited with attribution — SML did not re-crawl 31,620 resources tonight and does not claim those numbers as its own.
• Owner proof-wallet settlements referenced via the Verdict Protocol launch are self-tests, labeled as such everywhere — never customer purchases.

ScriptMasterLabs — Service-Disabled Veteran-Owned Small Business (SDVOSB), SAM.gov registered, UEI G24VZA4RLMK3, CAGE 21U51. Canonical: https://scriptmasterlabs.com/x402-discovery-listing