{"uid":"cap_vpPUpzlL4VjD_AN-mRuHD","slug":"particle-pro-get-topic-b886b528","name":"Particle Pro – Get Topic","description":"Get a topic. Returns a single topic with breadcrumb ancestors and the top direct children by prominence.","url":"https://api.particle.pro/v1/topics/:id","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"pathParams":{"type":"object","required":["id"],"properties":{"id":{"type":"string","description":"Topic ID, ancestry slug (e.g., technology/artificial-intelligence), or ancestry path hash"}}},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_YBYeCzRBifm7r4HGoIcyo","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Retrieves a single topic node with its breadcrumb ancestor chain and top direct child topics ranked by prominence.","exampleAgentPrompt":"What are the main sub-topics under 'technology/artificial-intelligence' in Particle Pro's topic hierarchy, including its breadcrumb ancestors?","exampleUseCases":[{"title":"Editorial topic taxonomy navigation","prompt":"Can you pull up the Particle Pro topic for 'technology/artificial-intelligence' and show me its parent categories and the top child topics ranked by prominence?"},{"title":"Content classification for news curation","prompt":"I'm building a news feed and need to know where 'climate-change' sits in the topic hierarchy — fetch its ancestor breadcrumbs and direct child topics from Particle Pro."},{"title":"Ad targeting topic context lookup","prompt":"We're planning a campaign around sports — can you look up that topic in Particle Pro and tell me what sub-topics are most prominent under it along with the full breadcrumb path?"}],"resultDescription":"Returns a single topic object including its unique ID, name, breadcrumb ancestor chain (showing the full path from root to the topic), and a ranked list of the most prominent direct child topics. This gives a complete view of where a topic sits in the content taxonomy and what sub-topics it contains.","failureModes":["Topic ID or slug not found — returns 404 with no topic data","Malformed slug or path hash — returns 400 bad request","Payment not fulfilled via x402 protocol — returns 402 Payment Required","Rate limit exceeded — returns 429 too many requests","Ambiguous slug matches multiple topics — may return unexpected topic"],"whenToPreferThis":"Use this endpoint when you need to understand the hierarchical context of a specific topic — its parent lineage and prominent children — as opposed to listing all topics or searching articles. Prefer it over a search endpoint when you already have a topic ID or well-known ancestry slug. It is ideal for building navigation trees, editorial classification tools, or ad-targeting context systems that require structured topic taxonomy data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:57:05.186Z","isFirstParty":false}