{"uid":"cap_VIziWQws-dANUWtaVknYl","slug":"goldsky-polymarket-balances-feed-0113502b","name":"Goldsky Polymarket Balances Feed","description":"Goldsky Feeds: onchain data over REST. Formerly Edge Data / Data APIs; existing URLs and keys keep working.\n\n- **Wallet feeds**: one wallet's token transfers or balances across chains, with USD values (`/feeds/wallets/transfers`, `/feeds/wallets/balances`).\n- **Tokens**: metadata and current USD price for up to 100 `chain:token_address` pairs per request (`/feeds/tokens`).\n- **Prediction markets** (Polymarket, on Polygon): Activity, Positions and Balances (`/polymarket/*`).\n- **Chain datasets**: Blocks and Chain head for each supported chain (`/blocks/{chain}`, `/blocks/{chain}/head`).\n\nBase URL: `https://edge.goldsky.com/data`. Every endpoint is a `GET` that returns JSON.\n\n## Authentication\n\nSend your Feeds API key in the `x-api-key` header, as the `?key=` query parameter, or as `Authorization: Bearer <key>`. Get it at [app.goldsky.com](https://app.goldsky.com) under **Feeds → API keys**. One key works for every endpoint; an invalid key gets `401`.\n\n## Billing\n\nRequests made with a key bill compute units (CUs) at $10 per million:\n\n- Wallet feeds and Tokens: 35 CUs per request.\n- Prediction markets and Chain datasets: 1 CU per row returned. Chain head is 1 CU per call.\n\nErrors are not billed, and a Prediction markets or Chain datasets request that returns no rows costs nothing. Rate limits are set per plan (`429` when exceeded); Goldsky support can raise them.\n\n## Pay per request with x402\n\nNo account or key needed. A request without a key gets `402` with an x402 v2 challenge in the `PAYMENT-REQUIRED` header (base64 JSON; the body carries the same challenge). Pay in USDC through Circle Gateway and retry. Each payment is a $0.005 prepaid top-up, tied to the paying wallet and shared with Edge RPC, that later requests spend down:\n\n- Wallet feeds and Tokens: $0.00035 (350 atomic USDC) per request.\n- Prediction markets and Chain datasets: $0.00001 (10 atomic USDC) per request, whatever the row count.\n\nThe payment flow is in [x402 nanopayments](https://docs.goldsky.com/edge-rpc/capabilities/x402).","url":"https://edge.goldsky.com/data/polymarket/balances?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":["address"],"properties":{"sort":{"type":["string","null"]},"limit":{"type":["integer","null"]},"cursor":{"type":["string","null"]},"address":{"type":"string"},"token_id":{"type":["string","null"]},"token_type":{"type":["string","null"]},"as_of_block":{"type":["integer","null"]},"min_balance":{"type":["string","null"]},"contract_address":{"type":["string","null"]}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","required":["data","limit"],"properties":{"data":{"type":"array","items":{"type":"object","required":["address","token_id","balance"],"properties":{"address":{"type":"string"},"balance":{"type":"string"},"token_id":{"type":"string"},"token_type":{"type":["string","null"]},"block_number":{"type":["integer","null"]},"block_timestamp":{"type":["integer","null"]},"contract_address":{"type":["string","null"]}}}},"limit":{"type":"integer"},"next_cursor":{"type":["string","null"]}}}}}}},"responseSchema":{"type":"json","schema":{"type":"object","properties":{"data":{"type":"array"},"limit":{"type":"integer"},"next_cursor":{"type":["string","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":null,"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_f0OGOeszxj8el4HGfx0YJ","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 token balances for a given wallet address on Polymarket, including position tokens and USDC holdings, with optional filtering and pagination","exampleAgentPrompt":"What token balances does the Polymarket wallet 0x1234...abcd hold right now? Show me up to 50 results and include the block timestamp.","exampleUseCases":[{"title":"Portfolio snapshot for a Polymarket trader","prompt":"Pull all the current outcome token balances for Polymarket wallet 0xABC123...def456 so I can see what positions they're holding right now."},{"title":"Minimum balance filter for large holders","prompt":"Find all token balances over 1000 units for wallet 0x789...xyz on Polymarket — I only care about meaningful positions, not dust."},{"title":"Historical balance audit at a specific block","prompt":"What did Polymarket wallet 0xDEAD...BEEF hold as of block 65000000? I need the balance snapshot at that exact point in time."}],"resultDescription":"A paginated JSON object containing an array of token balance records (each with address, token_id, balance, optional token_type, block_number, block_timestamp, contract_address), a limit integer, and a next_cursor string for fetching the next page (null if no more results).","failureModes":["Missing required 'address' query parameter returns a 400 or validation error","Invalid wallet address format may return empty data or an error","as_of_block set too far in the past may not be available in the indexed dataset","Payment not included or prepaid balance exhausted returns HTTP 402 Payment Required","Cursor from a previous query becomes stale if data has been re-indexed","Rate limiting or network issues at edge may cause transient 5xx errors"],"whenToPreferThis":"Use this endpoint when you need onchain token balance data specifically for Polymarket wallet addresses — particularly for querying outcome token positions, filtering by minimum balance, or paginating through a large number of holdings. Prefer this over generic blockchain RPC calls when you want a structured REST response without raw EVM decoding. Best suited for agents doing portfolio analysis, leaderboard construction, or position monitoring on Polymarket.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:39:33.807Z","isFirstParty":false,"canonicalSlug":"goldsky-polymarket-balances-feed-0113502b"}