{"id":"9a568391-c411-47ad-95db-bcecdf6e0592","shortId":"qyZaQf","kind":"x402","title":"X402-payable Flappy Bird game agent: send a message, get an interactive game block back.","tagline":"X402-payable Flappy Bird game agent: send a message, get an interactive game block back.","description":"This endpoint exposes an interactive Flappy Bird-style game block as an x402-payable agent hosted on Questflow's development API. You send a text message (POST with an `input` string), pay via the x402 protocol on Base Sepolia using USDC, and receive a response from the agent. The game features a cute bird character, click/spacebar controls, pipe obstacles, score tracking, and game-over display.\n\nPayment is handled through the x402 protocol (version 1) with an exact-amount scheme on the Base Sepolia testnet. The maximum amount required per request is 500,000 units of USDC (contract `0x036CbD53842c5426634e7929541eC2318f3dCF7e`), with a timeout of up to 1200 seconds. The endpoint accepts `application/json` and returns a string response from the agent.\n\nDocumentation is minimal — there is no OpenAPI spec, no dedicated docs page, and no pricing page beyond what the x402 challenge header reveals. The parent platform, Questflow, focuses on AI agent clones for onchain market trading and revenue generation, but this particular endpoint is a simple game demo. Because this runs on a testnet (Base Sepolia), it is likely intended for development or demonstration purposes rather than production use.","tags":[],"capabilities":["x402-payment","base-sepolia-testnet","usdc-payment","flappy-bird-game","interactive-game-block","agent-chat"],"categories":["games","agent"],"synonyms":["flappy bird","browser game","mini game","x402 game agent","questflow agent","onchain game","interactive game block","paid game API"],"warnings":["Runs on Base Sepolia testnet — not suitable for production use","No API documentation, OpenAPI spec, or usage examples available","Response format and game block delivery mechanism are unclear from available metadata","The example response is entirely inferred; actual response structure is unknown","Parent platform (Questflow) focuses on trading agents — this game endpoint appears to be a demo or side project"],"endpointUrl":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68dbd9a87706fb5081dcc99d","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x036CbD53842c5426634e7929541eC2318f3dCF7e","extra":{"name":"USDC","version":"2"},"payTo":"0x95Fc34c1923099998f470a93850669a9eFa7fB55","scheme":"exact","network":"base-sepolia","mimeType":"application/json","resource":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68dbd9a87706fb5081dcc99d","description":"An interactive Flappy Bird style game block with a cute bird character, click or spacebar to flap, navigate through pipes, track scores, and display game over. Ideal for personal or demo projects showcasing simple game mechanics. | Powered by Questflow","outputSchema":{"input":{"type":"http","method":"POST","bodyFields":{"input":{"type":"string","required":true,"description":"Your message to the agent"}},"discoverable":true},"output":{"response":{"type":"string","required":true,"description":"Response from the agent"}}},"maxAmountRequired":"500000","maxTimeoutSeconds":1200}]},"qualityScore":"0.250","qualityRationale":"No OpenAPI spec, no docs, no examples beyond the x402 challenge header. The output schema is minimal (single string in, single string out). Running on a testnet suggests this is a dev/demo endpoint. Almost all listing details are inferred from the x402 challenge 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'0x036cbd53842c5426634e7929541ec2318f3dcf7e':134 '1':109 '1200':141 '500':128 'accept':145 'agent':7,23,49,82,154,185 'agent-chat' 'ai':184 'amount':114,123 'api':55 'application/json':146 'back':16,32 'base':72,118,209 'base-sepolia-testnet' 'beyond':171 'bird':5,21,40,88 'bird-styl':39 'block':15,31,43 'browser game' 'challeng':175 'charact':89 'click/spacebar':90 'clone':186 'contract':133 'control':91 'cute':87 'dedic':164 'demo':202 'demonstr':218 'develop':54,216 'display':100 'doc':165 'document':155 'endpoint':34,144,197 'exact':113 'exact-amount':112 'expos':35 'featur':85 'flappi':4,20,38 'flappy bird' 'flappy-bird-game' 'focus':182 'game':6,14,22,30,42,84,98,201 'game-ov':97 'generat':193 'get':11,27 'handl':103 'header':176 'host':50 'input':64 'intend':214 'interact':13,29,37 'interactive game block' 'interactive-game-block' 'like':213 'market':189 'maximum':122 'messag':10,26,60 'mini game' 'minim':157 'obstacl':93 'onchain':188 'onchain game' 'openapi':161 'page':166,170 'paid game API' 'parent':179 'particular':196 'pay':66 'payabl':3,19,48 'payment':101 'per':125 'pipe':92 'platform':180 'post':61 'price':169 'product':222 'protocol':70,107 'purpos':219 'questflow':52,181 'questflow agent' 'rather':220 'receiv':77 'request':126 'requir':124 'respons':79,151 'return':148 'reveal':177 'revenu':192 'run':205 'scheme':115 'score':94 'second':142 'send':8,24,57 'sepolia':73,119,210 'simpl':200 'spec':162 'string':65,150 'style':41 'testnet':120,208 'text':59 'timeout':137 'track':95 'trade':190 'unit':130 'usdc':75,132 'usdc-payment' 'use':74,223 'version':108 'via':67 'x402':2,18,47,69,106,174 'x402 game agent' 'x402-payable':1,17,46 'x402-payment'","prices":[{"id":"624c8426-675e-4d5a-8650-ab487c6ec160","listingId":"9a568391-c411-47ad-95db-bcecdf6e0592","amountUsd":null,"unit":"per_call","nativeCurrency":"USDC","nativeAmount":"500000","chain":"base-sepolia","payTo":"0x95Fc34c1923099998f470a93850669a9eFa7fB55","paymentMethod":"x402-usdc","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x036CbD53842c5426634e7929541eC2318f3dCF7e","extra":{"name":"USDC","version":"2"},"payTo":"0x95Fc34c1923099998f470a93850669a9eFa7fB55","scheme":"exact","network":"base-sepolia","mimeType":"application/json","resource":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68dbd9a87706fb5081dcc99d","description":"An interactive Flappy Bird style game block with a cute bird character, click or spacebar to flap, navigate through pipes, track scores, and display game over. Ideal for personal or demo projects showcasing simple game mechanics. | Powered by Questflow","outputSchema":{"input":{"type":"http","method":"POST","bodyFields":{"input":{"type":"string","required":true,"description":"Your message to the agent"}},"discoverable":true},"output":{"response":{"type":"string","required":true,"description":"Response from the agent"}}},"maxAmountRequired":"500000","maxTimeoutSeconds":1200}],"asset_contract":"0x036CbD53842c5426634e7929541eC2318f3dCF7e","max_timeout_seconds":1200},"createdAt":"2026-04-18T18:30:24.085Z"}],"sources":[{"listingId":"9a568391-c411-47ad-95db-bcecdf6e0592","source":"x402_bazaar","sourceId":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68dbd9a87706fb5081dcc99d","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:30:24.085Z","lastSeenAt":"2026-04-22T02:30:08.990Z"}],"details":{"listingId":"9a568391-c411-47ad-95db-bcecdf6e0592","quickStartSnippet":"curl -X POST https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68dbd9a87706fb5081dcc99d \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{\"input\": \"Start the game\"}'","exampleRequest":{"input":"Start the game"},"exampleResponse":{"response":"Here is your Flappy Bird game block. Click or press spacebar to flap!"},"schema":{"input":{"type":"http","method":"POST","bodyFields":{"input":{"type":"string","required":true,"description":"Your message to the agent"}},"discoverable":true},"output":{"response":{"type":"string","required":true,"description":"Response from the agent"}}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"x402 challenge requires payment on base-sepolia with maxAmountRequired 500000 USDC","source_url":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68dbd9a87706fb5081dcc99d"},{"claim":"Description states: An interactive Flappy Bird style game block with a cute bird character, click or spacebar to flap, navigate through pipes, track scores, and display game over","source_url":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68dbd9a87706fb5081dcc99d"},{"claim":"USDC asset contract is 0x036CbD53842c5426634e7929541eC2318f3dCF7e with payTo address 0x95Fc34c1923099998f470a93850669a9eFa7fB55","source_url":"https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68dbd9a87706fb5081dcc99d"},{"claim":"Questflow is the parent platform, focused on AI agent clones for onchain markets","source_url":"https://api-dev.intra-tls2.dctx.link"}],"useCases":["Embedding a simple interactive Flappy Bird game in a demo or personal project","Testing x402 payment flows on Base Sepolia with a lightweight game agent","Demonstrating agent-to-agent micropayments for content delivery"],"bestFor":["Developers experimenting with x402 protocol payments on testnet","Demo projects showcasing simple game mechanics behind a paywall","Testing Questflow agent interactions"],"notFor":["Production game deployments (this is on Base Sepolia testnet)","Complex game development or multiplayer gaming","Users who need detailed API documentation or SLAs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:38.138Z"},"updatedAt":"2026-04-22T02:30:08.990Z"}}