Oracles & On-Chain Data Providers

A blockchain oracle bridges off-chain data — exchange spot prices, vault inventory attestations, cross-chain state — into smart contracts. For tokenized metals, oracles perform three critical functions: delivering spot price feeds (LME Gold, LBMA Silver, COMEX copper) to on-chain pricing logic; attesting proof-of-reserve for vaulted bullion backing token issuance; and relaying messages and asset state across chains via cross-chain interoperability protocols. Without reliable oracle infrastructure, redemption, settlement and collateral-management logic in metals RWA contracts cannot execute trustlessly.

Primary sources only 11 providers Updated 19 June 2026

Neutrality. TrueSource Metals Hub does not rank, rate or compare oracle providers, coverage, latency, decentralisation or security models. Every entry reproduces facts from the provider's own documentation and website. We do not endorse any oracle for any specific use case. The "notable for tokenized metals" field records publicly documented integrations or stated support — it is a factual classification, not a recommendation. See the full Ecosystem neutrality statement.

Why oracles matter for tokenized metals

Four functions that on-chain metals contracts depend on:

Spot price feeds. LME official prices, LBMA Gold/Silver benchmark fixes, and COMEX settlement prices are sourced off-chain. Oracles aggregate and deliver these to pricing contracts, collateral managers and redemption modules.
Proof of reserve attestation. Tokens backed by vaulted bullion must demonstrate that off-chain reserves match on-chain supply. Oracle PoR feeds query custodian APIs or signed attestation data and publish verifiable reserve figures on-chain.
Cross-chain messaging. A token issued on one chain (e.g. Ethereum) that is redeemable or bridgeable to another (e.g. Arbitrum, Avalanche, Solana) requires a cross-chain interoperability protocol to relay state securely.
Dispute and redemption verification. Optimistic oracle designs allow any data point — including vault inspection reports, assay results, or KYC completion confirmations — to be brought on-chain and challenged within a dispute window.

Provider directory

Alphabetical. Each entry cites the provider's own site and primary documentation only.

API3

Role: First-party oracle network that sources data directly from API providers operating their own Airnode, bypassing third-party node intermediaries. Publishes decentralised APIs (dAPIs) aggregated from first-party feeds.
Key products: dAPIs (aggregated first-party price feeds), Airnode (serverless oracle node), OEV Network (oracle extractable value recapture), API3 Market.
Primary docs: docs.api3.org
Jurisdiction: Cayman Islands (API3 DAO)
Notable for tokenized metals: First-party dAPI architecture removes one trust layer between data source and on-chain consumer; relevant for applications that require auditable data provenance for metals price feeds.

Sources: api3.org · docs.api3.org

Chainlink

Role: Decentralised oracle network providing Data Feeds (push-model aggregated price and reference data), Proof of Reserve (PoR) attestation feeds, and the Cross-Chain Interoperability Protocol (CCIP) for cross-chain messaging and token transfers.
Key products: Data Feeds, Proof of Reserve, CCIP, Data Streams, Automation, Functions, VRF.
Primary docs: docs.chain.link/data-feeds
Jurisdiction: Cayman Islands (Chainlink Foundation)
Notable for tokenized metals: Proof of Reserve feeds deployed for PAXG (Paxos Gold) on-chain reserve attestation; Data Feeds cited in bGLD (Backed Finance) and HashKey Gold price documentation; CCIP available for cross-chain metals token bridging.

Sources: chain.link · docs.chain.link · chain.link/proof-of-reserve

Chronicle

Role: Oracle protocol originally built as MakerDAO's internal oracle infrastructure, now operating independently. Uses a Schnorr-signature-based architecture with a set of permissioned validators (Scribe feeds) and a challenger mechanism for data integrity.
Key products: Chronicle Protocol feeds (Scribe), validator network, on-chain verifiable price feeds for DeFi protocols.
Primary docs: chroniclelabs.org
Jurisdiction: Not disclosed publicly
Notable for tokenized metals: Provides gold and silver price feeds to MakerDAO/Sky (DAI/USDS collateral system); relevant as a PoR-compatible data source for metals-backed stablecoins and vaults.

Source: chroniclelabs.org

DIA

Role: Open-source oracle platform that sources raw trade data from on-chain DEXes and centralised exchanges, publishes it transparently, and allows custom oracle feeds with user-configurable methodology (sources, filters, computation).
Key products: DIA Lumina (new oracle architecture), custom price feeds, NFT floor price feeds, stablecoin collateral feeds, Randomness oracle.
Primary docs: docs.diadata.org
Jurisdiction: Switzerland (DIA Association)
Notable for tokenized metals: Open-source methodology and fully transparent data sourcing allow independent verification of price computation — relevant for regulated metals tokens where auditors require traceable data lineage.

Sources: diadata.org · docs.diadata.org

eOracle

Role: Oracle network built as an EigenLayer Actively Validated Service (AVS), enabling Ethereum restakers to secure oracle data validation. Leverages Ethereum's economic security via EigenLayer restaking rather than a separate token-staking model.
Key products: EigenLayer AVS-secured price feeds, eOracle Protocol, data validation network.
Primary docs: docs.eoracle.network
Jurisdiction: Not disclosed publicly
Notable for tokenized metals: AVS architecture ties oracle security to Ethereum restaked ETH; relevant for metals tokens on Ethereum L1 and L2s where maximal cryptoeconomic security alignment is required.

Sources: eoracle.network · docs.eoracle.network

Pyth Network

Role: Pull-model oracle in which data publishers (exchanges, market makers, trading firms) sign and publish price attestations off-chain; consumers pull and verify proofs on-chain on demand, reducing gas overhead. Supports high-frequency updates.
Key products: Pyth Price Feeds (pull model), Pyth Entropy (randomness), Pyth Lazer (ultra-low-latency feeds), Benchmarks (historical price data).
Primary docs: docs.pyth.network
Jurisdiction: Cayman Islands (Pyth Data Association)
Notable for tokenized metals: Publishes gold (XAU/USD) and silver (XAG/USD) price feeds sourced from institutional data publishers; cross-chain availability across 50+ networks including Solana, Ethereum, Aptos and Sui.

Sources: pyth.network · docs.pyth.network

RedStone

Role: Modular oracle offering both push (Classic) and pull (Core) delivery models, plus an on-demand model (X Layer). Data is signed by a decentralised network of nodes and cached off-chain; consumers attach signed packages to transactions.
Key products: RedStone Core (pull), RedStone Classic (push), RedStone EVM Connector, price feeds for DeFi lending and RWA protocols.
Primary docs: docs.redstone.finance
Jurisdiction: Not disclosed publicly
Notable for tokenized metals: Supports gold (XAU) and silver (XAG) price feeds; modular design allows integration by RWA protocols that require flexible update frequency without continuous gas costs.

Sources: redstone.finance · docs.redstone.finance

Supra

Role: Cross-chain oracle and infrastructure layer providing price feeds, verifiable randomness (VRF), cross-chain communication (HyperNova bridge), and automation. Operates its own consensus layer (SupraOracles DORA protocol).
Key products: Supra Price Feeds, Supra VRF, HyperNova (cross-chain bridge), Supra Automation.
Primary docs: supra.com
Jurisdiction: British Virgin Islands
Notable for tokenized metals: Provides gold and silver price feeds with cross-chain delivery; HyperNova messaging layer available for cross-chain metals token state synchronisation.

Source: supra.com

Switchboard

Role: Permissionless, multi-chain oracle network originally native to Solana, now deployed on Aptos, SUI, EVM chains and others. Allows anyone to create custom oracle feeds (data jobs) using on-chain configuration.
Key products: Switchboard V3 feeds, Switchboard Functions (TEE-secured off-chain compute), on-demand oracle, randomness oracle.
Primary docs: docs.switchboard.xyz
Jurisdiction: Not disclosed publicly
Notable for tokenized metals: Primary oracle option for metals tokens issued on Solana (e.g. protocols integrating with Solana-based DeFi); also supports Aptos and SUI ecosystems where metals tokenisation is emerging.

Sources: switchboard.xyz · docs.switchboard.xyz

Tellor

Role: Decentralised oracle in which data reporters stake TRB tokens and compete to submit values. Submitted data can be disputed within a challenge window; disputes are resolved by TRB holders. Supports arbitrary data types, not only price feeds.
Key products: Tellor360 (current protocol), TRB staking and dispute system, custom query types for arbitrary off-chain data.
Primary docs: docs.tellor.io
Jurisdiction: United States
Notable for tokenized metals: Dispute mechanism and arbitrary-data support make it suitable for bringing vault inspection reports, assay certifications or redemption confirmations on-chain with a challenge window.

Sources: tellor.io · docs.tellor.io

UMA

Role: Optimistic oracle that resolves arbitrary data requests — including real-world events, PoR assertions and contract outcomes — through an optimistic mechanism: data is accepted unless disputed within a challenge period and adjudicated by UMA's Data Verification Mechanism (DVM).
Key products: Optimistic Oracle V3, Optimistic Governor, Across (cross-chain bridge secured by UMA), Data Verification Mechanism.
Primary docs: docs.uma.xyz
Jurisdiction: United States (Risk Labs Foundation)
Notable for tokenized metals: Optimistic oracle design is well-suited to PoR dispute resolution: a custodian or issuer asserts reserve adequacy; any party can challenge within the window; UMA DVM adjudicates. Also used in Across bridge for cross-chain token transfers.

Sources: uma.xyz · docs.uma.xyz

Use cases in the TSM ecosystem

How oracle functions map to tokenized-metals infrastructure requirements.

Function	Providers listed on this page	Notes
Spot price feeds XAU/USD, XAG/USD, copper, etc.	Chainlink Data Feeds, Pyth Network, RedStone, Chronicle, API3	LME, LBMA and COMEX spot prices are sourced off-chain. Oracle aggregation and delivery mechanisms vary by provider.
Proof of Reserve Vaulted bullion attestation	Chainlink PoR, Chronicle, UMA Optimistic Oracle	Chainlink PoR is documented for PAXG. Chronicle powers MakerDAO vault collateral. UMA allows arbitrary PoR assertions with dispute window.
Cross-chain messaging Bridge and interop	Chainlink CCIP, Supra HyperNova, UMA / Across	Enables metals tokens to move or synchronise state across EVM chains, Solana, and alt-L1s without relying on a single custodial bridge.
Dispute & redemption verification Arbitrary real-world data	UMA, Tellor	Both protocols support arbitrary data types and include challenger mechanisms, enabling assay reports, KYC completion or vault inspection outcomes to be disputed on-chain.
Solana / Aptos / SUI chains Non-EVM ecosystem	Switchboard, Pyth Network	Both are natively deployed on Solana; Switchboard additionally covers Aptos and SUI.

Oracles & On-Chain Data Providers

Why oracles matter for tokenized metals

Provider directory

Use cases in the TSM ecosystem

Related TSM Hub pages

Primary sources