{"id":"4bc5a639-9d7d-49e1-8e6d-b2886150af2c","shortId":"RXdcW3","kind":"x402","title":"Hire a siege mercenary in 4x402 strategy game — $1.00 USDC via x402 on Base.","tagline":"Hire a siege mercenary in 4x402 strategy game — $1.00 USDC via x402 on Base.","description":"This endpoint lets agents or players hire a Siege mercenary in 4x402, an async multiplayer 4X strategy game built for the Farcaster community. The Siege mercenary costs $1.00 USDC and performs a direct attack on an enemy node with a 40% success rate. It is described in the game docs as a \"desperation move\" — powerful but unreliable.\n\n4x402 is a four-player game played on a procedural network graph where players explore, expand, exploit resources, and exterminate opponents over several days. Mercenaries are distinct from normal in-game units: they are hired with real USDC via the x402 protocol and provide powerful, instant effects. The Siege mercenary is the most expensive of the three mercenary types (Scout at $0.25, Raider at $0.50, Siege at $1.00).\n\nThe endpoint accepts POST requests and is gated by an x402 payment challenge on the Base network. Payment is made in USDC (contract 0x8335…2913) with a max amount of 1,000,000 units (i.e., $1.00 USDC with 6 decimals). The game ID in the URL path identifies a specific match instance. No OpenAPI schema or detailed request/response documentation is published beyond the x402 challenge and the game's docs page.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","game-action","mercenary-hire","siege-attack","async-strategy"],"categories":["gaming","payments"],"synonyms":["4x402 siege","mercenary hire","x402 game action","strategy game micropayment","siege mercenary","4x402 mercenary","farcaster strategy game","x402 usdc game"],"warnings":["No OpenAPI or request/response schema published — request body format is unknown","Game ID in URL is match-specific; endpoint only works for active game instances","No detailed API documentation page exists (4x402.com/api returns 404)","40% success rate means the $1.00 payment may not yield a successful attack"],"endpointUrl":"https://4x402.com/api/games/5fab9ce6-249b-418a-803d-687b5ac36b6b/mercs/siege","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0xf5b49961126F950c4937e818CA926C47bB14Ef70","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://4x402.com/api/games/5fab9ce6-249b-418a-803d-687b5ac36b6b/mercs/siege","description":"","outputSchema":{"input":{"type":"http","method":"POST","discoverable":true}},"maxAmountRequired":"1000000","maxTimeoutSeconds":300}]},"qualityScore":"0.450","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge. Game docs describe the Siege mercenary's cost and effect clearly. However, there is no OpenAPI spec, no documented request body schema, and no example response, making integration details largely 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'0.50':152 '000':187,188 '0x8335':179 '1':186 '1.00':9,23,56,155,191 '2913':180 '40':69 '4x':44 '4x402':6,20,40,86 '4x402 mercenary' '4x402 siege' '6':194 'accept':158 'agent':32 'amount':184 'async':42 'async-strategy' 'attack':62 'base':14,28,171 'base-network' 'beyond':217 'built':47 'challeng':168,220 'communiti':51 'contract':178 'cost':55 'day':110 'decim':195 'describ':74 'desper':81 'detail':212 'direct':61 'distinct':113 'doc':78,225 'document':214 'effect':134 'endpoint':30,157 'enemi':65 'expand':102 'expens':141 'exploit':103 'explor':101 'extermin':106 'farcast':50 'farcaster strategy game' 'four':90 'four-play':89 'game':8,22,46,77,92,118,197,223 'game-action' 'gate':163 'graph':98 'hire':1,15,35,122 'i.e':190 'id':198 'identifi':203 'in-gam':116 'instanc':207 'instant':133 'let':31 'made':175 'match':206 'max':183 'mercenari':4,18,38,54,111,137,145 'mercenary hire' 'mercenary-hire' 'move':82 'multiplay':43 'network':97,172 'node':66 'normal':115 'openapi':209 'oppon':107 'page':226 'path':202 'payment':167,173 'perform':59 'play':93 'player':34,91,100 'post':159 'power':83,132 'procedur':96 'protocol':129 'provid':131 'publish':216 'raider':150 'rate':71 'real':124 'request':160 'request/response':213 'resourc':104 'schema':210 'scout':147 'sever':109 'sieg':3,17,37,53,136,153 'siege mercenary' 'siege-attack' 'specif':205 'strategi':7,21,45 'strategy game micropayment' 'success':70 'three':144 'type':146 'unit':119,189 'unreli':85 'url':201 'usdc':10,24,57,125,177,192 'usdc-micropayment' 'via':11,25,126 'x402':12,26,128,166,219 'x402 game action' 'x402 usdc game' 'x402-payment'","prices":[{"id":"e3ed1c0f-ba84-450e-b8cf-288faad17a55","listingId":"4bc5a639-9d7d-49e1-8e6d-b2886150af2c","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"1000000","chain":"base","payTo":"0xf5b49961126F950c4937e818CA926C47bB14Ef70","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0xf5b49961126F950c4937e818CA926C47bB14Ef70","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://4x402.com/api/games/5fab9ce6-249b-418a-803d-687b5ac36b6b/mercs/siege","description":"","outputSchema":{"input":{"type":"http","method":"POST","discoverable":true}},"maxAmountRequired":"1000000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:31:34.583Z"}],"sources":[{"listingId":"4bc5a639-9d7d-49e1-8e6d-b2886150af2c","source":"x402_bazaar","sourceId":"https://4x402.com/api/games/5fab9ce6-249b-418a-803d-687b5ac36b6b/mercs/siege","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:31:34.583Z","lastSeenAt":"2026-04-25T05:34:07.177Z"}],"details":{"listingId":"4bc5a639-9d7d-49e1-8e6d-b2886150af2c","quickStartSnippet":"curl -X POST https://4x402.com/api/games/5fab9ce6-249b-418a-803d-687b5ac36b6b/mercs/siege \\\n  -H 'Content-Type: application/json' \\\n  -H 'X-PAYMENT: <x402_payment_header>'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"POST","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Siege mercenary costs $1.00 USDC and has a 40% success rate direct attack","source_url":"https://4x402.com/docs"},{"claim":"Mercenaries are hired using USDC via the x402 protocol and provide powerful, instant effects","source_url":"https://4x402.com/docs"},{"claim":"x402 challenge requires payment on Base network in USDC with maxAmountRequired 1000000","source_url":"https://4x402.com/api/games/5fab9ce6-249b-418a-803d-687b5ac36b6b/mercs/siege"},{"claim":"4x402 is an async multiplayer strategy game for four players built for the Farcaster community","source_url":"https://4x402.com/docs"},{"claim":"Three mercenary types: Scout ($0.25), Raider ($0.50), Siege ($1.00)","source_url":"https://4x402.com/docs"}],"useCases":["Hire a siege mercenary to directly attack an enemy node in a 4x402 match","Automate aggressive strategies by programmatically purchasing siege attacks","Build a bot or agent that manages mercenary spending in 4x402 games"],"bestFor":["Players or agents in active 4x402 matches needing a direct attack option","Automated game-playing agents that interact with x402-gated game endpoints","Developers experimenting with x402 micropayment-powered game mechanics"],"notFor":["General-purpose combat or strategy APIs outside the 4x402 game","Users looking for free or non-payment-gated game actions","Non-Base-network USDC payments"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:06.664Z"},"updatedAt":"2026-04-25T05:34:07.177Z"}}