Stellar developers now have two distinct Chainlink architectures for bringing external market data into Soroban applications, allowing protocols to choose between continuously maintained on-chain reference prices and lower-latency data retrieved when a transaction executes. Chainlink Data Feeds and Data Streams are both live on Stellar mainnet, but they solve different pricing requirements and use materially different delivery models.
According to the Stellar Development Foundation’s official implementation guide, Data Feeds currently provide nine mainnet reference rates covering XLM, BTC, ETH, LINK, USDC, USDT and EURC against the dollar, alongside an XAUM gold reference rate and FLHY/USD real-world asset feed. The initial feed set extends oracle coverage beyond crypto prices into stablecoins, commodities and tokenized financial assets.
For most of those feeds, Chainlink publishes a new value when price changes by at least 0.5% or when the 24-hour heartbeat expires. XAUM uses a tighter 0.1% deviation threshold. These parameters are snapshots and can change as Chainlink updates its feed configurations.
Data Feeds Push Prices On-Chain
Chainlink Data Feeds use the more familiar push architecture. Oracle networks periodically place updated reference prices on Stellar, allowing applications such as lending markets, vaults and stablecoin systems to read an already available value when they need one. This model prioritizes a shared on-chain reference price rather than obtaining a new quote for every transaction.
Stellar’s implementation differs from the per-feed contract structure commonly used on EVM networks. A single proxy contract serves all supported feeds, with each market identified through a unique 32-byte data_id. Developers can request the latest round and receive the price, round identifier and timestamp.
That timestamp is operationally important. Stellar’s guide specifically recommends checking it against ledger time and rejecting stale values instead of assuming that a successfully returned price is sufficiently recent. Oracle availability and oracle freshness are separate conditions, particularly for applications managing collateral or user funds.
The infrastructure also gives tokenized assets on Stellar a route into more complex financial applications. Centrifuge has already brought tokenized U.S. Treasuries and AAA credit products to Stellar, where assets can trade against USDC. Elsewhere, Chainlink Data Feeds are providing reference pricing for tokenized stocks on Base. Reliable pricing infrastructure can make tokenized assets usable as inputs for lending and trading, although oracle availability alone does not demonstrate actual DeFi adoption.
Data Streams Pull Fresh Prices at Execution
Data Streams uses the opposite delivery model. Instead of continuously writing every update to Stellar, an application retrieves a signed report off-chain through Chainlink’s API and submits it to a verifier contract when the price is required. This pull architecture targets time-sensitive applications such as perpetual markets, options and liquidation engines where the price at execution matters more than maintaining a continuously updated on-chain reference.
The verifier checks that the report contains the required number of valid and unique signatures from registered Chainlink oracles. It does not automatically determine whether the report is recent enough for a particular application, so developers must independently evaluate fields such as observationsTimestamp and expiresAt.
That distinction makes Data Streams particularly relevant to markets requiring frequent valuation. Chainlink’s real-time pricing infrastructure is already being used in institutional settings, including DTCC’s tokenized Treasury pilot on Canton, where Data Streams supports valuation inputs for collateral workflows.
Stellar participates in the Chainlink Scale program, under which blockchain ecosystems can subsidize portions of oracle-network operating costs while usage develops. That arrangement does not make every Chainlink service free: Data Streams remains a subscription product, and application-level transaction costs still depend on how developers consume the data.
The practical development is therefore not simply that Stellar “has Chainlink.” Developers can now select between a push-based reference-price layer and a pull-based low-latency data path according to the economic and risk requirements of each application. Whether that infrastructure translates into meaningful lending, derivatives or tokenized-asset activity will depend on the applications and volume built on top of it.
Owen Bennett covers crypto’s most restless corners: altcoins, memecoins, airdrops, launchpads, NFTs and gaming. Based in Canada, he follows the markets where communities form quickly, attention rotates without warning and a real catalyst can sit next to a mountain of hype.
Owen’s job is to sort the signal from the spectacle. He looks at launches, retail rotations, community traction, token ecosystems and speculative narratives without dressing every project up as the next big winner. His writing keeps the energy of these sectors, but with enough distance to avoid getting swept away by them.