{"id":"13373c11-4bc6-48be-b27b-9b3108bea081","shortId":"r4FNTy","kind":"mpp","title":"Pay-per-post API to retrieve full Substack article content via MPP or x402 payment protocols.","tagline":"Pay-per-post API to retrieve full Substack article content via MPP or x402 payment protocols.","description":"DripStack is a paid API that lets AI agents and applications retrieve full-text content from Substack publications. The service ingests Substack RSS feeds, stores post metadata, and gates access to the full HTML content behind a per-post micropayment wall using both the MPP (Payment HTTP Authentication Scheme) and x402 v2 protocols.\n\nThe API has several free endpoints: listing all imported publications, viewing publication metadata and post titles, paginated post listings, and importing/refreshing a publication from its Substack feed. The paid endpoint is GET /api/v1/publications/{publicationSlug}/{postSlug}, which returns the complete post body (including contentHtml) after payment. Pricing is dynamic per post, ranging from $0.05 to $10.00 USD, with the runtime 402 challenge being authoritative. Settlement uses USDC on-chain (e.g., via AgentCash or Tempo wallets on Base).\n\nThe OpenAPI 3.1 spec is thorough, with full JSON schemas for all request/response types, clear x-payment-info annotations, and detailed agent guidance in the info.x-guidance field. The endpoint ownership is attested via a did:pkh proof on Base (0xBF22b6…). Note that the probe returned 404 on the parameterized post route because no actual publication/post slugs were supplied — this is expected behavior, not a sign the endpoint is down. The landing page at dripstack.xyz is live (HTTP 200) and shows real purchase activity across multiple publications.","tags":["substack","blog","publication","post","data","query"],"capabilities":["substack-content-retrieval","per-post-micropayment","mpp-payment-protocol","x402-payment-protocol","publication-import","publication-listing","post-listing","paginated-results","html-content-delivery","dynamic-pricing","openapi-3.1-spec"],"categories":["content","search","payment"],"synonyms":["substack api","paid article access","newsletter content api","substack scraper","content paywall api","micropayment content","agent content purchase","substack full text","newsletter retrieval"],"warnings":["Probe returned 404 on the parameterized endpoint because placeholder path params were used — not indicative of a down endpoint","The /docs page returns 404; no standalone documentation site was found","Dynamic pricing ($0.05–$10.00) means costs vary per post and the 402 challenge is authoritative"],"endpointUrl":"https://dripstack.xyz/api/v1/publications/:publicationSlug/:postSlug","protocol":"mpp","transport":"http","auth":{"type":"mpp","details":{"realm":"dripstack.xyz","intent":"charge","method":"tempo","service_methods":{"tempo":{"assets":["0x20c000000000000000000000b9537d11c60e8b50"],"intents":["charge"]}}}},"qualityScore":"0.720","qualityRationale":"Full OpenAPI 3.1 schema with detailed component definitions, clear x-payment-info annotations, and agent guidance. The probe returned 404 because no real slugs were supplied (expected for parameterized routes). The landing page is live with real purchase data. Docs page returns 404, and no separate documentation site was found, which limits the score 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'0.05':142 '0xbf22b6':207 '10.00':144 '200':245 '3.1':169 '402':149 '404':213 'access':65 'across':251 'activ':250 'actual':221 'agent':43,189 'agent content purchase' 'agentcash':161 'ai':42 'annot':186 'api':5,22,39,91 'applic':45 'articl':10,27 'attest':199 'authent':84 'authorit':152 'base':166,206 'behavior':229 'behind':71 'bodi':130 'chain':158 'challeng':150 'clear':181 'complet':128 'content':11,28,50,70 'content paywall api' 'contenthtml':132 'detail':188 'dripstack':35 'dripstack.xyz':241 'dynam':137 'dynamic-pricing' 'e.g':159 'endpoint':95,119,196,234 'expect':228 'feed':59,116 'field':194 'free':94 'full':8,25,48,68,174 'full-text':47 'gate':64 'get':121 'guidanc':190 'html':69 'html-content-delivery' 'http':83,244 'import':98 'importing/refreshing':110 'includ':131 'info':185 'info.x-guidance':193 'ingest':56 'json':175 'land':238 'let':41 'list':96,108 'live':243 'metadata':62,102 'micropay':76 'micropayment content' 'mpp':13,30,81 'mpp-payment-protocol' 'multipl':252 'newsletter content api' 'newsletter retrieval' 'note':208 'on-chain':156 'openapi':168 'openapi-3.1-spec' 'ownership':197 'page':239 'pagin':106 'paginated-results' 'paid':38,118 'paid article access' 'parameter':216 'pay':2,19 'pay-per-post':1,18 'payment':16,33,82,134,184 'per':3,20,74,138 'per-post':73 'per-post-micropayment' 'pkh':203 'post':4,21,61,75,104,107,129,139,217 'post-listing' 'postslug':124 'price':135 'probe':211 'proof':204 'protocol':17,34,89 'public':53,99,101,112,253 'publication-import' 'publication-listing' 'publication/post':222 'publicationslug':123 'purchas':249 'rang':140 'real':248 'request/response':179 'retriev':7,24,46 'return':126,212 'rout':218 'rss':58 'runtim':148 'schema':176 'scheme':85 'servic':55 'settlement':153 'sever':93 'show':247 'sign':232 'slug':223 'spec':170 'store':60 'substack':9,26,52,57,115 'substack api' 'substack full text' 'substack scraper' 'substack-content-retrieval' 'suppli':225 'tempo':163 'text':49 'thorough':172 'titl':105 'type':180 'usd':145 'usdc':155 'use':78,154 'v2':88 'via':12,29,160,200 'view':100 'wall':77 'wallet':164 'x':183 'x-payment-info':182 'x402':15,32,87 'x402-payment-protocol'","prices":[{"id":"fd2d8f71-f2e8-4166-b2ce-7a6076e90754","listingId":"13373c11-4bc6-48be-b27b-9b3108bea081","amountUsd":null,"unit":"per_call","nativeCurrency":"pathUSD","nativeAmount":null,"chain":"tempo","payTo":null,"paymentMethod":"mpp-tempo","isPrimary":true,"details":{"realm":"dripstack.xyz","intent":"charge","method":"tempo","dynamic":true,"decimals":6,"unit_type":null,"amount_hint":"$0.05-$10","raw_payment":{"intent":"charge","method":"tempo","dynamic":true,"currency":"0x20c000000000000000000000b9537d11c60e8b50","decimals":6,"amountHint":"$0.05-$10","description":"Get post content"},"asset_contract":"0x20c000000000000000000000b9537d11c60e8b50"},"createdAt":"2026-04-20T21:44:55.880Z"}],"sources":[{"listingId":"13373c11-4bc6-48be-b27b-9b3108bea081","source":"mpp_dev","sourceId":"dripstack:GET:/api/v1/publications/:publicationSlug/:postSlug","sourceUrl":"https://mpp.dev/api/services","isPrimary":true,"firstSeenAt":"2026-04-20T21:44:55.880Z","lastSeenAt":"2026-04-22T01:15:06.813Z"}],"details":{"listingId":"13373c11-4bc6-48be-b27b-9b3108bea081","quickStartSnippet":"# 1. List publications (free)\ncurl https://dripstack.xyz/api/v1/publications\n\n# 2. Get publication details + post slugs (free)\ncurl https://dripstack.xyz/api/v1/publications/notboring.co\n\n# 3. Get full post (paid — returns 402 with MPP/x402 challenge)\ncurl -i https://dripstack.xyz/api/v1/publications/notboring.co/weekly-dose-of-optimism-188\n# Then retry with Authorization: Payment <credential> header after paying","exampleRequest":null,"exampleResponse":{"id":"abc123","url":"https://notboring.co/p/example-post","guid":"https://notboring.co/p/example-post","slug":"example-post","title":"Example Post Title","author":"Packy McCormick","imageUrl":"https://example.com/image.jpg","subtitle":"A subtitle","createdAt":"2025-01-15T12:00:00Z","updatedAt":"2025-01-15T12:00:00Z","contentHtml":"<p>Full HTML content of the post...</p>","description":"Post description excerpt","publishedAt":"2025-01-15T12:00:00Z","publicationId":"pub456","publicationSlug":"notboring.co"},"schema":{"path":"/api/v1/publications/:publicationSlug/:postSlug","method":"GET","payment":{"intent":"charge","method":"tempo","dynamic":true,"currency":"0x20c000000000000000000000b9537d11c60e8b50","decimals":6,"amountHint":"$0.05-$10","description":"Get post content"},"description":"Get post content"},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Pricing is dynamic per post, ranging from $0.05 to $10.00 USD","source_url":"https://dripstack.xyz"},{"claim":"The API supports both MPP and x402 v2 payment protocols","source_url":"https://dripstack.xyz"},{"claim":"Ownership attested via did:pkh:eip155:8453:0xBF22b6DdB5A08c823856A779f1004eEa60C5aB92","source_url":"https://dripstack.xyz"},{"claim":"Top sold article has 7 purchases earning $0.35","source_url":"https://dripstack.xyz"},{"claim":"Agent wallets can be funded via AgentCash or Tempo Wallet with USDC","source_url":"https://dripstack.xyz"}],"useCases":["AI agent retrieving full Substack articles for research or summarization","Building a content aggregation pipeline that pays per article consumed","Programmatic access to paywalled newsletter content for analysis","Agent-driven competitive intelligence gathering from Substack publications","Importing and indexing Substack publications for a search application"],"bestFor":["AI agents that need full-text Substack content on demand","Developers building content pipelines with per-article micropayments","Research workflows requiring programmatic access to newsletter archives","Applications integrating MPP or x402 payment protocols for content access"],"notFor":["Bulk scraping of entire publication archives at low cost (dynamic pricing applies per post)","Accessing content from platforms other than Substack (only Substack feeds supported)","Free unlimited content retrieval (all full-text access requires payment)"],"kindDetails":{"docs":{"llmsTxt":"https://dripstack.xyz/SKILL.md","homepage":"https://dripstack.xyz/?tab=agents"},"tags":["substack","blog","publication","post","data","query"],"realm":"dripstack.xyz","status":"active","methods":{"tempo":{"assets":["0x20c000000000000000000000b9537d11c60e8b50"],"intents":["charge"]}},"provider":{"url":"https://dripstack.xyz/","name":"DripStack"},"categories":["web","data"],"service_id":"dripstack","integration":"third-party","service_name":"DripStack","service_description":"MPP-enabled content retrieval from Substack publications."},"updatedAt":"2026-04-22T01:15:06.813Z"}}