Developer Infrastructure · 7 min read
Indexers and data providers for Arc, mapped
Envio, Goldsky, The Graph, thirdweb and Zerion document Arc data support. Dune, Covalent and Ponder don't, as of 2 Sep 2026. Here's the landscape.
Circle's documentation names five data providers for Arc as of 2 September 2026: Envio, Goldsky, The Graph, thirdweb (Insight), and Zerion. Dune, Covalent, and Ponder do not appear on that list, and Built on Arc found no independent Arc-specific integration from any of the three. Arc's testnet block explorer, testnet.arcscan.app, is confirmed and live; no mainnet explorer has been published. Anything TVL- or yield-dashboard-shaped belongs to ArcYield, not this guide.
Why indexing is its own layer, not part of RPC
Raw RPC access answers "what's the current state" one call at a time; an indexer answers "give me every transfer event matching this filter across the chain's history" without a team re-scanning blocks itself. On an EVM chain that's normally a GraphQL subgraph (The Graph, Goldsky) or a hosted event-indexing framework (Envio); on Arc specifically there's an added wrinkle documented in Circle's own EVM-differences reference — native USDC transfers emit Transfer logs from a system address in 18 decimals, separate from the ERC-20 contract's own 6-decimal Transfer events, which an indexer needs to de-duplicate deliberately rather than sum both.
The five providers Circle documents
Envio — a "developer-first indexing framework for event-driven data and GraphQL APIs on Arc," with HyperIndex for rapid API deployment and live event streaming.
Builds on Arc: Runs an event-driven indexing framework with a GraphQL API for Arc. · Role: Serves · Category: Developer Infrastructure → Indexing & explorers
Goldsky — managed subgraph services and data-pipeline infrastructure, with autoscaling query capacity and real-time streaming to external databases.
Builds on Arc: Provides managed subgraphs and streaming data pipelines for Arc. · Role: Serves · Category: Developer Infrastructure → Indexing & explorers
The Graph — the decentralized subgraph protocol, querying Arc's onchain data with redundancy across independent indexers.
Builds on Arc: Indexes Arc onchain data via decentralized, redundant subgraph queries. · Role: Serves · Category: Developer Infrastructure → Indexing & explorers
thirdweb — its Insight data API for retrieving and enriching Arc blockchain data; also independently documents Arc Testnet support (chain ID 5042002, RPC endpoint, faucet) on its own site. Its canonical primary role in this directory is Account abstraction.
Builds on Arc: Offers an Insight data API for retrieving Arc chain data. · Role: Serves · Category: Developer Infrastructure → Indexing & explorers
Zerion — portfolio and wallet data, covering balances, positions, and real-time wallet activity.
Builds on Arc: Surfaces Arc wallet balances and portfolio positions via its data API. · Role: Serves · Category: Developer Infrastructure → Indexing & explorers
None of the five carries a mainnet-specific claim in the material Built on Arc reviewed — the entire indexing layer, like the rest of Arc's developer stack, is documented against testnet as of 2 Sep 2026.
What's not on the list
Circle's data-provider documentation does not name Dune, Covalent, or Ponder, and none of the three had a public Arc-specific integration, blog post, or dashboard Built on Arc could source as of 2 Sep 2026. That is worth stating plainly rather than assuming: a chain being EVM-compatible does not automatically mean every general-purpose indexer has shipped support, and in Arc's case, three widely used ones evidently have not yet, at least not visibly.
The explorer situation
Arc's testnet explorer, testnet.arcscan.app, is live and confirmed — it is the reference explorer named throughout Circle's own documentation. No mainnet explorer URL has been published as of 2 Sep 2026, which is consistent with the broader pattern covered in /guides/arc-testnet-vs-mainnet-what-changes-for-builders: Circle has not yet issued the mainnet-facing infrastructure values a team needs to point production tooling at.
What this layer is not for
None of the providers above, nor Arc's testnet explorer, functions as a yield or TVL dashboard — that is a distinct product category, owned on the Built on Arc network by ArcYield, which tracks protocol-level yield and TVL data across DeFi on Arc. A team building its own analytics on top of an indexer listed here is doing infrastructure work; a team looking for an existing yield dashboard should go straight to ArcYield rather than building one from a subgraph.
Choosing between the five
This guide does not rank them, but the categories are genuinely different in shape: The Graph and Goldsky are subgraph-model services (schema-defined GraphQL over indexed events), Envio is positioned as a faster, more developer-controlled alternative in the same event-indexing space, thirdweb's Insight is a general-purpose data API rather than a custom-schema subgraph, and Zerion is specifically wallet/portfolio-shaped rather than general contract-event indexing. Which fits depends on whether the need is "query my own contract's events with a custom schema" (subgraph-model) or "show a user's balances and activity" (Zerion-shaped), not on which provider is "better."
Sources: - Arc data indexers - Arc EVM differences reference - Arc connection reference - thirdweb: Arc Testnet
*Built on Arc is an independent directory. Arc is a Circle product; we are not affiliated with, endorsed by, or operated by Circle.*
Questions
Is testnet.arcscan.app Circle's own explorer or a third party's?
Circle's documentation references it as the reference explorer for Arc Testnet; Built on Arc did not independently verify its operator identity beyond that it is the URL Circle's own docs point to.
Can I use a generic EVM indexer that hasn't announced Arc support?
Technically Arc is EVM-compatible, so generic tooling may work, but the EVM-differences documented by Circle (native-token transfer events, no base-fee burn) mean an indexer not specifically tested against Arc could double-count or mis-handle those cases. Treat unannounced compatibility as unverified, not assumed-working.
Does The Graph's decentralized network already have live Arc subgraphs?
Circle's documentation confirms The Graph as a supported data provider for Arc; Built on Arc did not verify the count or maturity of live third-party subgraphs already deployed, which is a separate question from platform support existing.
Where do I find TVL or yield data for Arc protocols?
That's ArcYield's remit, not an indexer question — see arcyield.app.
Will Dune or Covalent add Arc support before mainnet?
Built on Arc does not speculate on unannounced roadmaps. Neither had confirmed Arc support as of 2 Sep 2026.