{"uid":"cap_aycjNcvSXTp22UvxvmXF0","slug":"zaref-dev-south-african-reference-series-change-feed-a4d5f6a6","name":"zaref.dev South African Reference Series Change Feed","description":"Which South African reference series changed or were reconfirmed since a given date. The cheap cache-freshness check for agents. Optional param: since=YYYY-MM-DD (defaults to the last 30 days).","url":"https://zaref.dev/v1/changes?utm_source=zero.xyz","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"},"queryParams":{"type":"object","properties":{"since":{"type":"string"}}}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":{"p10Cents":"0.5000","medianCents":"0.5000","p90Cents":"0.5000","minCents":"0.5000","maxCents":"0.5000","p95Cents":"0.5000","sampleCount":1,"varies":false,"failureChargeRate":1},"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_IRYQ2qo-ZSsVGc9nxZPDD","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns which South African regulatory/statistical reference series have changed or been reconfirmed since a given date, enabling cache-freshness checks.","exampleAgentPrompt":"Check which South African reference series on zaref.dev have changed or been reconfirmed since 2025-03-01 so I know what to refresh in my cache.","exampleUseCases":null,"resultDescription":"A list of South African reference series (e.g. CPI, SASSA grants, NCA rates, toll fees) that have either changed or been reconfirmed since the supplied date, allowing the agent to determine which cached data is stale and needs re-fetching.","failureModes":["Missing or malformed 'since' parameter returns a 400 error","Date in wrong format (not YYYY-MM-DD) causes a parse error","Future date returns empty change list","Payment not included or insufficient results in 402 Payment Required"],"whenToPreferThis":"Use this endpoint before fetching individual South African reference data series to check which ones have actually changed since your last sync — it is the cheap cache-freshness signal that avoids unnecessary paid calls to individual data endpoints on zaref.dev.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-23T01:34:09.482Z","isFirstParty":false,"canonicalSlug":"zaref-dev-south-african-reference-series-change-feed-a4d5f6a6"}