{"uid":"cap_9CCvPFWb15cLgVnjI2YvW","slug":"arkham-altcoin-index-8833d1e7","name":"Arkham Altcoin Index","description":"Get Arkham Altcoin Index. $0.20 per call.","url":"https://api.arkm.com/x402/marketdata/altcoin-index","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","properties":{},"additionalProperties":{"anyOf":[{"type":"string"},{"type":"number"},{"type":"boolean"},{"type":"array","items":{"anyOf":[{"type":"string"},{"type":"number"},{"type":"boolean"}]}}]}},"type":{"type":"string","const":"http"},"method":{"enum":["POST","PUT","PATCH"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema"}}}}},"responseSchema":{"type":"json","example":{"altcoinIndex":28}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.2","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.2/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.2","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.2","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_FcysU5VD-l5ExELkYzGNr","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.2","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the current Arkham altcoin market index value as a numeric score","exampleAgentPrompt":"What's the current Arkham altcoin index right now? I want to see the numeric score they use to track overall altcoin market conditions.","exampleUseCases":[{"title":"Real-time altcoin market monitoring","prompt":"Can you check the Arkham altcoin index for me right now? I want to know the current score to see how the broader altcoin market is trending."},{"title":"Trading signal dashboard integration","prompt":"Pull the current Arkham altcoin index and let me know the number — I use it as one of my inputs when deciding whether to increase my altcoin exposure."},{"title":"Crypto market briefing","prompt":"Give me a quick summary of altcoin market conditions using the Arkham altcoin index — what's the current reading?"}],"resultDescription":"Returns a JSON object containing a single numeric field `altcoinIndex` (e.g. {\"altcoinIndex\": 28}), representing the current Arkham altcoin market index value on a numeric scale.","failureModes":["Payment failure if x402 USDC balance is insufficient — returns 402 Payment Required","Authentication failure if API key is invalid or missing — returns 401 Unauthorized","Service unavailability if Arkham data pipeline is down — returns 5xx error","Rate limiting if too many requests are made in a short period — returns 429 Too Many Requests"],"whenToPreferThis":"Choose this endpoint when you need a single, authoritative numeric index reflecting overall altcoin market conditions as measured by Arkham Intelligence. Ideal for real-time dashboards, trading signal pipelines, or market briefing agents that want a concise altcoin sentiment or momentum score without processing raw price feeds. Prefer this over general crypto price APIs when the Arkham-specific index methodology is desired.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T19:03:05.085Z","isFirstParty":false}