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MycелiaSignal USDC Best Yield Oracle
x402
MycелiaSignal USDC Best Yield Oracle is a paid API for AI agents from api.myceliasignal.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-13).
Returns the best available USDC supply yield rate across all DeFi protocols and chains, signed with Ed25519 attestation
Price / call$0.05
Success—
StatusUnknown
How this service works
Best USDC supply yield across all protocols and chains — Ed25519 signed attestation
Output
Returns the highest available USDC supply APY found across all monitored DeFi protocols and blockchains, including the protocol name, chain, yield rate, and an Ed25519 cryptographic signature attesting to the data's authenticity and freshness.
Example use cases
Optimize treasury stablecoin allocation
“We're holding $500K in USDC and want to move it to wherever it's earning the best yield right now. Can you find the highest APY available and get me a signed proof so our finance team can verify it before we execute the transfer?”
Compare yield across our portfolio
“We've got USDC spread across three different protocols. Can you check what the absolute best rate is right now across all of DeFi so we can see if we're missing out, and get me something cryptographically signed we can audit?”
Alert when yield moves significantly
“Set up monitoring on the best USDC yield available. If it jumps to a better opportunity than our current position, let me know with a signed attestation so I can move our funds quickly without doing manual research every day.”
Technical details
Endpoint
GEThttps://api.myceliasignal.com/oracle/defi/yield/best/usdcWhen to prefer
Use this endpoint when you need a single, authoritative, cryptographically attested answer to 'where is USDC yielding the most right now' without having to query each protocol individually. Ideal for agents managing treasury, optimizing stablecoin yield allocation, or any workflow requiring a tamper-evident signed oracle rather than an unsigned aggregate.
Side effects
- Payment not processed — 402 response requiring $0.05 USDC payment via x402 protocol
- No yield data available — protocols temporarily unreachable
- Rate limit exceeded — too many requests in a short window
- Signature verification failure — Ed25519 attestation cannot be validated
- Stale data — underlying protocol feeds not refreshed recently
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"all": [
{
"asset": "USDC",
"chain": "base",
"source": "on-chain",
"protocol": "moonwell_base",
"borrow_apr": 6.6733,
"supply_apr": 5.4162
},
{
"asset": "USDC",
"chain": "base",
"source": "on-chain",
"protocol": "compound_v3_base_usdc",
"borrow_apr": 6.2368,
"supply_apr": 5.2258,
"utilization": 90.62
},
{
"asset": "USDC",
"chain": "base",
"source": "morpho-api",
"tvl_usd": 1340261620,
"protocol": "morpho_blue_base",
"borrow_apr": 5.4298,
"collateral": "cbBTC",
"supply_apr": 4.8962
},
{
"asset": "USDC",
"chain": "ethereum",
"source": "morpho-api",
"tvl_usd": 266628068,
"protocol": "morpho_blue_ethereum",
"borrow_apr": 4.1735,
"collateral": "cbBTC",
"supply_apr": 3.692
},
{
"asset": "USDC",
"chain": "ethereum",
"source": "on-chain",
"protocol": "spark_ethereum",
"borrow_apr": 4.5093,
"supply_apr": 3.632,
"last_update": 1781729987
},
{
"asset": "USDC",
"chain": "avalanche",
"source": "on-chain",
"protocol": "aave_v3_avalanche",
"borrow_apr": 4.4253,
"supply_apr": 3.601,
"last_update": 1781731790
},
{
"asset": "USDC",
"chain": "base",
"source": "on-chain",
"protocol": "aave_v3_base",
"borrow_apr": 4.241,
"supply_apr": 3.2375,
"last_update": 1781732177
},
{
"asset": "USDC",
"chain": "ethereum",
"source": "on-chain",
"protocol": "compound_v3_ethereum_usdc",
"borrow_apr": 3.9462,
"supply_apr": 3.1703,
"utilization": 88.06
},
{
"asset": "USDC",
"chain": "ethereum",
"source": "on-chain",
"protocol": "aave_v3_ethereum",
"borrow_apr": 3.8836,
"supply_apr": 3.122,
"last_update": 1781732195
},
{
"asset": "USDC",
"chain": "polygon",
"source": "on-chain",
"protocol": "aave_v3_polygon",
"borrow_apr": 5.9611,
"supply_apr": 2.8427,
"last_update": 1781731904
},
{
"asset": "USDC",
"chain": "optimism",
"source": "on-chain",
"protocol": "aave_v3_optimism",
"borrow_apr": 3.699,
"supply_apr": 2.7705,
"last_update": 1781732207
},
{
"asset": "USDC",
"chain": "arbitrum",
"source": "on-chain",
"protocol": "aave_v3_arbitrum",
"borrow_apr": 3.2804,
"supply_apr": 2.1792,
"last_update": 1781732200
},
{
"asset": "USDC",
"chain": "avalanche",
"source": "on-chain",
"protocol": "benqi_avalanche",
"borrow_apr": 5.8375,
"supply_apr": 1.931
},
{
"asset": "USDC",
"chain": "arbitrum",
"source": "on-chain",
"protocol": "compound_v3_arbitrum_usdc",
"borrow_apr": 2.7383,
"supply_apr": 1.4503,
"utilization": 37.19
},
{
"asset": "USDC",
"chain": "bnb",
"source": "on-chain",
"protocol": "venus_bnb",
"borrow_apr": 0.6321,
"supply_apr": 0.3661
}
],
"best": {
"asset": "USDC",
"chain": "base",
"source": "on-chain",
"protocol": "moonwell_base",
"borrow_apr": 6.6733,
"supply_apr": 5.4162
},
"asset": "USDC",
"count": 15,
"pubkey": "f4f0e52b5f7b54831f965632bf1ebf72769beda4c4e3d36a593f7729ec812615",
"canonical": "v1|DEFI_YIELD|/oracle/defi/yield/best/usdc|92dc2d4885e1b99a6677034140242a24|1781732280|580544",
"signature": "e4410d107a890bdc2a0ac1581be0d1a60387bcb7a28456868ed51cf198ef88a42c0695c937161cffbcc6ba36d1b2fb31a3dc4b8da3adb7bce3ac7947836d4b03",
"fetched_at": "2026-06-17T21:37:04.414350+00:00",
"signingScheme": "ed25519"
}Tags
x402
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