Chainlink is a decentralised oracle network: it hands smart contracts on a blockchain exactly the data they cannot see for themselves. Prices, interest rates, reserve balances, weather data, results from other blockchain networks. The LINK token pays the machines that fetch and certify that data. To understand what Chainlink is in economic terms, the price is the wrong place to start. Begin with the question of what anyone is paying for.
The project publishes the figure that shows it: $36.4 trillion in transaction value has passed through Chainlink oracles by its own count up to the start of October. This article explains what sits behind that, which services exist, what role the token plays and what an investor in Germany needs to know about buying, custody and the tax office.
Chainlink is an oracle network, not a blockchain of its own
An oracle in crypto is a bridge: a facility that carries information from outside a blockchain inside, in a form a smart contract can work with. Chainlink runs no main network of its own that holds balances. The Chainlink software runs on independent nodes, operated by node operators, and serves contracts on other blockchain networks: Ethereum, Solana, Avalanche, BNB Chain, Base and dozens more.
The foundation is a document dated September 4, 2017. Steve Ellis, Cornell professor Ari Juels and Sergey Nazarov set out the problem that everything still hangs on, under the title “ChainLink: A Decentralized Oracle Network”. Sergey Nazarov and Steve Ellis have counted as the founders of the project ever since, Ari Juels as the academic mind behind it. The network went live on Ethereum in 2019.
In price tables the project appears as Chainlink (LINK): Chainlink is the name of the network, LINK the ticker of the token. The two belong together but do not mean the same thing. The Chainlink network is a layer above blockchain technology with exactly one function: to deliver certified data to the place where a contract needs it.
One point matters for reading the market: Chainlink does not compete with Bitcoin or Ethereum. It competes with other oracle providers. Comparing it to a currency is misleading; comparing it to an infrastructure supplier comes closer.
The oracle problem: a blockchain knows nothing about the outside world
A blockchain is a closed system. Every node has to arrive at the same result, or there is no consensus. That is precisely why a smart contract may not query anything outside itself: two nodes calling the same internet address a second apart might get two different answers, and the blockchain would split. This inability to communicate outwards is not a flaw but the price of verifiability.
The problem becomes practical the moment a contract needs to know something about the world. A lending protocol that has to liquidate a loan when the ether price falls below a threshold needs the price. Crop insurance needs rainfall figures. A tokenised money market fund needs its net asset value. Without a reliable source the contract stays blind.
The obvious fix would be a single data supplier, and that is the most dangerous one of all: whoever controls the only price source of a lending protocol can trigger the liquidations that suit them. Attacks of this kind have cost millions several times over in recent years. The Chainlink model answers with distribution: several independent nodes fetch the same value from several independent data vendors, agree on a common value through an off-chain computation and write only the result to the blockchain.
From data point to contract: the path through an oracle network
An oracle network at Chainlink is a fixed group of nodes that supply one value together. The sequence is always the same. Each node fetches the value from several paid data providers, not from a single exchange. The nodes then exchange their results and form an average from which outliers drop out. That intermediate result is signed and only then written to the target blockchain in a single transaction. The contracts there read nothing but the finished value.
Two things about this matter for investors. First, the actual work happens off the blockchain, which saves fees, because not every individual reading costs a transaction. Second, a node that reports wrong values over time falls out of the average and loses business. The system punishes poor delivery through reputation, not through a court.
Data Feeds and Data Streams: price data for DeFi trading
Data feeds are the oldest product and still the most widely used. A data feed is an oracle network that keeps one particular value permanently up to date, ETH in US dollars for example. The value is rewritten as soon as it has moved by a set margin or a set period has passed. Practically every large lending protocol in DeFi hangs on price data of this kind; it decides when posted collateral is no longer enough.
Data Streams are the fast variant for markets where seconds count. Here the value sits signed off the blockchain and is only pulled in at the moment a contract needs it. Exchanges for perpetual futures use this: traders running leveraged long positions need a price that is not twenty seconds old, or the delay alone creates losses that nobody caused.
The difference in one sentence: the data feed writes continuously, the data stream delivers on request.
Chainlink CCIP: the Cross-Chain Interoperability Protocol
The Cross-Chain Interoperability Protocol, CCIP for short, is the second large service. It moves tokens and messages between blockchain networks. A cross-chain transfer does not work by a coin physically travelling: on one side it is locked or taken in, on the other released or newly issued, and an oracle network certifies that the first step really happened.
The second version has been running since September 28, 2026. Chainlink describes it in its announcement of CCIP 2.0 as a standard for institutions: banks and issuers can plug in their own checkpoints, so-called cross-chain verifiers, which have to sign on top of the network’s standard check before a transfer is executed. That lets an in-house check on regulation and sanctions be built into the transfer path. The same announcement names Fidelity International, Sygnum, Taurus, SBI Digital Markets, ANZ, Google Cloud and Amazon Web Services among its partners, plus two houses with a German connection in Crypto Finance, part of Deutsche Börse Group, and AllUnity.
Proof of Reserve, Verifiable Random Function and Automation: what the other services do
Besides data and transfers there are four further services that often get overlooked in practice.
Proof of Reserve checks whether a token really is backed. An oracle network reads the balance of the custodian or the reserve address and publishes it onchain. For tokenised gold, backed stablecoins and wrapped coins, that is the answer to the question of whether the backing still holds.
The Verifiable Random Function, VRF for short, produces randomness that a smart contract can verify. Randomness is hard on a blockchain, because everything has to be traceable and therefore becomes predictable. VRF delivers a random number together with proof that it was not tampered with. It is used in raffles, in the allocation of rare collectibles and in games.
Automation triggers contracts under defined conditions. A smart contract cannot wake itself up; somebody has to prompt it. Automation handles that prompt reliably, for the daily interest settlement of a lending protocol for instance.
Functions, finally, lets a contract query any programming interface and have the result computed, without having to set up an oracle network of its own.
How to tell whether an application uses Chainlink
For investors this is no academic question: deposit into a lending protocol and you take on its price source with it. Three routes lead to the answer. A protocol’s documentation names the price source almost always in the section on liquidations. Chainlink’s own project page lists the networks and applications that draw on the services. And to be certain, read the contract address the protocol queries for the price out of the blockchain explorer and compare it with the published address of the data feed. A protocol that names its price source nowhere is the warning sign, not the answer.
The LINK token: what it pays for and how many are in circulation
The LINK token is technically an ERC-20 token, originally issued on Ethereum and today available on many blockchain networks. Its job in the network is narrowly drawn: whoever uses a service pays the node operators, and that payment runs through LINK. The token is therefore a fee for work, not a share certificate. It carries no claim to a slice of the revenue, and no vote over the protocol either.
The supply figures, taken from CoinGecko: maximum supply is one billion LINK, with around 766.8 million in circulation. Market capitalisation stood at about $8.8 billion on Monday morning, enough for rank 16 among all cryptocurrencies. The price was $11.43, or €10.19. The all-time high of $52.70 dates from May 9, 2021; over the past 30 days the LINK price shows a loss of almost 18 percent.
The gap between circulation and maximum supply, a good 233 million LINK, sits with the project and is being spent gradually on incentives and operating costs. That supply is the most underrated point of all: it amounts to close to a quarter of the issued amount, and there is no fixed, publicly visible release schedule for it.
Chainlink staking: 45 million LINK and a 28-day wait
LINK has been stakeable in the network since late 2023. Staking is meant to give data suppliers an economic incentive to deliver correctly: whoever stakes is liable with their deposit for the quality of delivery and is paid for it. The cap is 45 million LINK, split into roughly 40.9 million for the general public and 4.1 million for node operators. Private participants face a maximum amount per address.
Two points decide whether this is an option for you. The pool has lately been full, so new places only open up when somebody else leaves; the portal at staking.chain.link shows the free space in real time. And the exit takes time: notice is followed by a 28-day period, after which a window of seven days remains in which to actually collect the coins. The reward for the general pool was recently just over 4 percent a year. How that stacks up against other offers is shown in our comparison of staking platforms.
One risk remains in every case: if you are locked in for 28 days, you cannot react to a price slump.
Banks, Swift and DTCC: what tokenisation has to do with Chainlink
Tokenisation means representing a conventional asset, a bond or a fund unit for instance, as a token on a blockchain. For banks the appeal lies in settlement: when paper and money sit on the same blockchain, the exchange can happen in one step instead of over two days.
This is exactly where Chainlink turns up. On its own pages the project names Swift, Euroclear, Mastercard, Fidelity International, UBS, ANZ and J.P. Morgan as houses deploying the infrastructure; the CCIP 2.0 announcement adds DTCC and Wellington Management. The role is the same in every case: Chainlink supplies the link between the bank’s systems and the blockchain, along with the certified data both sides need.
Caution is in order when judging this, for two reasons. Many of these applications are pilot projects and first production runs, not mass business. And it is not publicly documented so far how much of the fees arising is actually settled through the LINK token. A contract with a major bank is not automatically revenue for the token. That the contracts are coming is shown by our report on the agreement with the Korean group LG CNS; how much of it reaches the token is the open question behind it.
The Chainlink Reserve: where the network’s usage fees end up
Since 2025 there has been a mechanism that collects revenue from use of the services and buys LINK with it, which then stays in a reserve. Technically this runs through so-called payment abstraction: customers may pay in various tokens, the network converts the amounts, and a share lands in this reserve. A public dashboard at metrics.chain.link reports the balance.
At the end of October it held around 6.4 million LINK, with a good 1.5 million added in the third quarter. Measured against circulation that comes to less than 1 percent. Our analysis of the purchases of recent weeks shows what matters here: the reserve is a consequence of usage, not price support. Chainlink has promised neither a timetable nor a minimum amount, and a purchase of one million dollars sits against daily turnover of more than $170 million. Read a price floor into that and you overestimate the order of magnitude considerably.
The reserve is interesting for a different reason. The balance makes visible in numbers, for the first time, how much money the network actually takes in through its services. That is the metric against which the potential of the model can be measured over the long run.
Chainlink vs Pyth, RedStone and API3
Chainlink is the largest provider of its kind, but not the only one. Pyth Network relies on trading houses and exchanges feeding in their prices themselves, which makes it particularly fast. RedStone delivers values only on request and is therefore cheaper for protocols that rarely need a price. API3 has the data source run the oracle itself and saves the intermediate step.
The competition runs on price, speed and coverage, and Chainlink does not win it everywhere. A case from September shows where it ends: when the provider Switchboard shut down its oracles, protocols on Solana had to migrate within weeks. What to do in such a case we set out in our analysis of the Switchboard shutdown. In Chainlink’s favour on this point is duration: the network has run since 2019 without a shutdown.
LINK in Germany: buying, custody and the one-year holding period
For trading LINK in Germany, the same applies as for any other coin since the European regulation on markets in crypto-assets: the provider needs authorisation. Whether a house has it is stated in the register of the European securities regulator ESMA and in the company database of BaFin, and both can be checked in two minutes. What the authorisation means and what it does not deliver is set out in our overview of the MiCA obligations.
Custody comes down to the usual trade-off. On an exchange access is quick, but the keys belong to the provider. In a wallet of your own they belong to you, and with them the responsibility for the backup. A hot wallet is connected and convenient, a cold wallet stays offline and is safer. LINK adds one particularity: for staking, the token has to sit in a wallet you control yourself.
For tax purposes LINK is an other asset under section 23 of the German Income Tax Act. Three rules follow from that. A sale within a year of purchase is taxable; after a holding period of one year the gain stays tax-free. Taxable gains in a year carry an exemption threshold of €1,000, and once it is exceeded the full amount is taxable, not only the excess. Staking income counts instead as other income under section 22 no. 3 with its own threshold of €256 and falls due in the year it is received.
The holding period was politically up for debate recently. On October 9, 2026 the Bundestag rejected its abolition by 445 votes to 132 on our count, as recorded in our report on the vote in the Bundestag. If you buy from 2026 on, keep the purchase receipt all the same: without proof of acquisition costs, the tax office sets them at zero in case of doubt.
The limits of the model: concentration, competition and a token with no claim on fees
Three objections belong in any honest assessment. The first concerns the connection between business and token: the network can grow without the price following, because the token does not automatically share in revenue. Closing that gap is exactly what the reserve is for, and so far it is small.
The second concerns concentration. A large part of DeFi hangs on Chainlink prices. For the project that is an advantage, for the market a concentration risk: a serious fault in the network would hit many protocols at once.
The third concerns the contest for institutions. Swift, Deutsche Börse and several central banks are working in parallel on their own connections between blockchain and legacy systems. Whether one oracle network establishes itself as the standard, or whether the large houses end up building their own solution, is open as things stand.
Chainlink in your portfolio: three points before your first LINK
Chainlink sells infrastructure, not a currency. That makes the case more sober than with many other coins and the judgement harder at the same time, because a gap yawns between the success of the network and the price of the token, bridged for now only by the reserve.
- Settle the buying route and the costs. Compare the spread, the trading fee and the withdrawal fee before you order; on a position of a few hundred euros these items decide more about the outcome than the entry point does. The providers are listed in our exchange comparison.
- Fix custody in advance. Decide before you buy whether the token stays on the exchange or moves into a wallet of your own, and set the wallet up first. The devices and their prices are in the hardware wallet comparison.
- Collect records from day one. Purchase date, price and fee belong in a list from the very first order, or the holding period cannot be proven later. Which tool does that automatically is shown in our comparison of tax tools.
(As of October 26, 2026. This article is not investment advice. Prices and fee structures change; check the terms with the provider before you buy.)
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