Self-indexing x402 discovery + payment intelligence

x402

Discover paid APIs, agent tools, facilitators, directories, apps, networks and payment activity as they appear.

Open explorer Browse directory

Machine indexGET https://x402mpp.sh/data/search.json

Indexer status

—resources

—services

—networks

—last scanned

01 / Global index

Machine Payment Discovery

x402 is distributed by design. x402mpp.sh follows that shape: Bazaar catalogs, live 402 challenges, well-known manifests, sitemaps, facilitator lists, directories and submitted URLs all become evidence for one normalized graph.

—indexed resources —live 402 endpoints —discovery sources

Probe

Detect real HTTP 402 responses and decode v2 PAYMENT-REQUIRED headers or v1 payment bodies.

Federate

Read Bazaar discovery endpoints and public ecosystem indexes instead of trusting a single directory.

Normalize

Map resources, networks, schemes, assets, payees, methods, providers and evidence into stable records.

Publish

Regenerate explorer data, detail pages, feeds, llms files and split XML sitemaps after every successful crawl.

02 / Fresh arrivalsView all →

Newly discovered.

The latest resources and ecosystem entries seen by the indexer.

Loading live index…

03 / Payment pulse

Follow the volume,
not the noise.

Payment metrics are stored as sourced snapshots. x402mpp.sh keeps official ecosystem totals separate from third-party measured floors so the numbers remain attributable.

Read metric snapshots →

Loading sourced payment metrics…

04 / Discovery mesh

Built to find what
directories miss.

Bazaar is one powerful source, not the only source. The index rotates through independent discovery lanes and preserves evidence for how each record entered the graph.

01Bazaar catalogs/discovery/resources

02402 probesPAYMENT-REQUIRED

03Well-known/.well-known/x402*

04Ecosystem linksdirectories + GitHub

05Payment metricssourced snapshots

06Submissionsqueued + verified

05 / DirectoryBrowse every category →

Paid endpoints→APIs, data, tools, content Facilitators→Verify, settle, discover Apps + agents→Clients and agent commerce Explorers→Analytics and payment tools Directories→Catalogs and registries SDKs + tooling→Libraries, middleware, infra MCP + A2A→Agent-native transports Networks→Payment rails and assets

Open discovery

Know a new x402 site?

Submit any public URL. The crawler will probe it, follow discovery hints, and publish verified records automatically.

x402mpp