Penny Press
Short essays and fragments. Free for humans; machines pay pennies per read via x402.
| Endpoint | https://www.pennypress.org/mcp (streamable-http) |
|---|---|
| Registry version | 1.0.1 |
| Now | 7 tools · grade A (98) · pin ts_5c5e9f20bce4cf4fe76fdd5800a76fa7 · protocol 2025-06-18 |
| First / last listed | 2026-11-11 01:19 UTC / 2026-11-11 01:19 UTC |
| Grade over time | 2026-11-11: A (98), 7 tools |
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Tools: list_essays essay_payment_info lexicon_lookup lexicon_snapshot_info common_cents_info witness_verify witness_attest_info
list_essays | List all published essays and fragments: titles, descriptions, prices, and reading URLs. Full text is free for humans at /read/{slug}; machine reads at /essays/{slug} are paid via x402 (USDC on Base). params: none |
essay_payment_info | Get the x402 payment details for one essay (price, network, asset, recipient wallet) so a machine buyer knows how to pay. params: slug* |
lexicon_lookup | Look up a term in the Penny Press Lexicon (the author's own definitions of his political-economy vocabulary). Returns free metadata — part of speech and the essays where the term appears — plus payment info for the $0.01 full definition. params: term* |
lexicon_snapshot_info | Payment details for the Penny Press Lexicon full dataset snapshot ($0.25): every author-defined term with part of speech, definition, verbatim usage example, and source essays, as versioned JSON. params: none |
common_cents_info | Overview of Common Cents, the Penny Press collection of 20 author-curated quotations in five themed clusters: the themes, quote count, and payment info for the $0.01 full machine-readable set. params: none |
witness_verify | Check whether a SHA-256 content hash has been witnessed by LitWit, the Penny Press literary notary. Free. Returns the matching attestation entries (entry id, sequence, timestamp, title) or an empty result. params: content_hash* |
witness_attest_info | How to attest a work's fingerprint with LitWit ($0.05): what to submit, what the tamper-evident receipt contains, and the x402 payment details. The service never sees your work — only its hash. params: none |
Entries describe changes in tool definitions. They are not statements about a server, its quality or its author. The grade measures how the tool definitions fit model providers (token cost, schema compatibility, confusable names) as scored by the ToolFit engine at the time of the listing. JSON: append .json. Opt-out: how or hello@youraitools.co.