x402 resource directory

Find paid HTTP operations and MCP tools by URL, host, method or tool name. Compare payment terms across networks and catalogs.

Distinct HTTP URLs
164,839
Distinct MCP URLs
43
Catalog observations
263,972
URLs with a 402 in 7 days
2,279
Network identifiers
183

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POST https://denk.halowerk.com/v1/bazaar-listing-check · 2 observations
Derives payTo from the live 402 challenge if not supplied, first tries the CDP natural-language search filtered by payTo, then paginates the CDP merchant discovery list for that payTo (100 entries per page, the CDP maximum; parallel, up to 400 pages, failed pages are retried within the time budget) and looks for the exact resource URL. "not_listed" is only returned after a complete scan with a stable total; otherwise the verdict is "unknown".

denk.halowerk.com profile

  • Base · exact
    $0.0030 (USDC)
    Recipient 0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E
    Coinbase CDP · seen
    Coinbase CDP reports 1 calls and 1 unique payers in 30 days. Last call .
  • Base · exact
    $0.0030 (USDC)
    agentic.market · seen
POST https://denk.halowerk.com/v1/hybrid-search · 2 observations
Ranks up to 100 supplied documents twice: lexically with BM25 (same implementation and defaults as bm25-search) and semantically by cosine similarity of embeddings computed locally (multilingual: intfloat/multilingual-e5-small, MIT, with the required "query: "/"passage: " prefixes, truncation at 512 tokens; english: sentence-transformers/all-MiniLM-L6-v2, Apache-2.0, truncation at 256 word pieces; mean pooling and L2 normalization, int8 ONNX exports from the model repositories, pinned and…

denk.halowerk.com profile

  • Base · exact
    $0.0050 (USDC)
    Recipient 0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E
    Coinbase CDP · seen
    Coinbase CDP reports 1 calls and 1 unique payers in 30 days. Last call .
  • Base · exact
    $0.0050 (USDC)
    agentic.market · seen
POST https://denk.halowerk.com/v1/rag-metrics · 2 observations
All metrics are defined in the response. With relevant_ids: precision@k and recall@k over the first k contexts, MRR, average precision and nDCG@k with binary relevance and log2 discount. Without relevant_ids, a context counts as relevant when it supports the reference (or the question if no reference) at or above the threshold; context precision = mean of precision@i over relevant positions (rank-weighted, as in RAGAS but without an LLM judge).

denk.halowerk.com profile

  • Base · exact
    $0.0040 (USDC)
    Recipient 0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E
    Coinbase CDP · seen
    Coinbase CDP reports 1 calls and 1 unique payers in 30 days. Last call .
  • Base · exact
    $0.0040 (USDC)
    agentic.market · seen
POST https://denk.halowerk.com/v1/rerank · 2 observations
Scores every (query, passage) pair with a cross-encoder run locally through transformers.js/ONNX Runtime and sorts by the model logit; relevance is the logistic sigmoid of the logit. multilingual: cross-encoder/mmarco-mMiniLMv2-L12-H384-v1 (Apache-2.0, trained on mMARCO: en, ar, zh, nl, fr, de, hi, id, it, ja, pt, ru, es, vi). english: cross-encoder/ms-marco-MiniLM-L6-v2 (Apache-2.0, MS MARCO, English only).

denk.halowerk.com profile

  • Base · exact
    $0.0050 (USDC)
    Recipient 0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E
    Coinbase CDP · seen
    Coinbase CDP reports 1 calls and 1 unique payers in 30 days. Last call .
  • Base · exact
    $0.0050 (USDC)
    agentic.market · seen
POST https://denk.halowerk.com/v1/x402-spend-report · 2 observations
Queries Transfer events from the wallet on Base mainnet via public RPC in 10,000-block windows and sums them by recipient and by UTC day. Timestamps are derived from block numbers using the fixed 2-second Base block time, anchored at the latest block (or at to_block for a fixed historical window). Covers token transfers only (no ETH gas). Useful for checking what an autonomous agent actually paid for x402 calls.

denk.halowerk.com profile

  • Base · exact
    $0.0030 (USDC)
    Recipient 0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E
    Coinbase CDP · seen
    Coinbase CDP reports 6 calls and 5 unique payers in 30 days. Last call .
  • Base · exact
    $0.0030 (USDC)
    agentic.market · seen

Counts describe directory coverage, including testnets. Each resource groups the same URL, HTTP method or MCP tool across sources. A catalog sighting records published terms. A live 402 records the endpoint’s reply to an unpaid request.