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The single most common question is “what percentage of my list will match”. The honest answer needs two numbers, not one, and mixing them up will make you plan a campaign you cannot run.

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Two different numbers

~23% has an identity

Roughly a quarter of wallets in a typical collection resolve to something: an ENS name, a Farcaster account, an X handle, or some combination.

~13% is reachable

Roughly half of those resolve to an account you can actually contact on X or Farcaster.
The gap between them is mostly ENS. An ENS name is an identity, and it is useful for display and for deduplicating a list, but you cannot send a message to it. If your plan is outreach, 13% is your planning number. If your plan is analysis or labelling, 23% is. For context, the industry average for wallet-to-social matching sits near 2.5%.
These figures come from measured samples across real collections, not from a marketing estimate. They still vary a lot by collection. A 2021 PFP project and a fresh airdrop farm will not behave the same way, and neither will match the average.

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Coverage is not uniform across networks

The two networks behave so differently that it is worth treating them as separate products.

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Farcaster coverage is complete

Every Farcaster account is indexed, along with the addresses attached to it, and the index is refreshed daily. This makes Farcaster matching deterministic rather than probabilistic. If a wallet belongs to a Farcaster user, we return it. There is no confidence threshold to tune and no long tail we have not reached yet. A miss means the wallet genuinely is not attached to a Farcaster account. That property is worth more than it first sounds. It means a Farcaster negative is real information, not an absence of information.

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X coverage is owner-attested

X handles are a different shape of problem. There is no protocol-level registry linking an X account to a wallet, so we never infer the link. Every X handle we return was published by the owner of the account, through one of two routes:
  • The owner verified their X account on Farcaster.
  • The owner set the handle in an ENS text record on their own address.
Over a million wallets have a linked X handle on this basis. The tradeoff is deliberate. Coverage would be considerably higher if we guessed, matching on display names or bios or timing correlations. We do not, because a marketing campaign that contacts the wrong person is worse than one that contacts fewer people. Everything returned is something the owner chose to publish.
Attested does not mean current. Someone can verify a handle and later abandon or rename that account. See data quality for how staleness is tracked and surfaced.

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Checking coverage yourself

Do not take these numbers on faith. GET /api/v1/stats returns live totals for the whole index, and it costs no credits, so you can call it before you commit to anything. For a specific list, run a sample through POST /api/v1/batch and measure directly. A few hundred addresses is enough to get a usable estimate for your own collection, which is more useful than any average we can publish.