Genesis402

Find DeFi yields

genesis402_defi_yields

Find and rank DeFi yield pools from DefiLlama by chain, protocol, token, stablecoin-only, and minimum TVL to locate yield opportunities for an asset.

Instructions

Paid ($0.01 USDC). Ranked DeFi yield pools from DefiLlama (15,000+ pools), filterable by chain, protocol, token, stablecoin-only and minimum TVL. Use to answer 'where is the best yield for X'. For other DeFi or market data search genesis402_catalog and call the endpoint through genesis402_call. All filters are optional and combine with AND; with none set it returns the top pools above $1M TVL. Returns up to limit pools, each with protocol, chain, symbol, TVL, base APY vs reward APY, 30-day mean APY, impermanent-loss risk, exposure and DefiLlama's outlook class. APYs are variable and backward-looking; not investment advice. Payment: call once without payment_signature to get the exact price quote (nothing is charged or signed), then call again with the signed payment to receive the result and settlement details.

Input Schema

TableJSON Schema

Name	Required	Description
`sort`	No	Sort order: 'apy' (highest yield first) or 'tvl' (largest pool first).
`chain`	No	Filter to one chain by name, e.g. Ethereum, Base, Arbitrum. Omit for all chains.
`limit`	No	How many pools to return, 1 to 100.
`token`	No	Token symbol that must be in the pool, e.g. USDC, ETH, WBTC.
`project`	No	Filter to one protocol by its DefiLlama slug, e.g. aave-v3. Omit for all protocols.
`min_tvl_usd`	No	Minimum pool TVL in US dollars as a plain number. Defaults to 1000000 ($1M) when omitted.
`stablecoin_only`	No	true = only stablecoin pools. Omit or false for all pools.
`payment_signature`	No	Optional. An x402 v2 payment you signed for this call's quote (the PAYMENT-SIGNATURE header value). Omit to get the price quote first; nothing is charged without it.

Output Schema

TableJSON Schema

Name	Required	Description
`mode`	Yes	QUOTE_ONLY: price quote only, nothing signed or charged. PAID: the call was paid and result holds the data. FREE: the endpoint answered without payment.
`paid`	Yes	true only when a payment was settled for this call.
`price`	No	The Base USDC quote. Present on QUOTE_ONLY and on PAID calls made by a local payer; null when the rail offered no Base USDC lane or the caller signed the payment.
`result`	No	PAID or FREE: the endpoint's JSON result.
`resource`	No	QUOTE_ONLY: the full URL of the paid resource.
`how_to_pay`	No	QUOTE_ONLY: how to sign and resend the call.
`settlement`	No	PAID: decoded PAYMENT-RESPONSE settlement (transaction hash, network, payer), or null if the rail sent none.
`what_you_get`	No	QUOTE_ONLY: the rail's description of what the payment buys.
`payment_required_b64`	No	QUOTE_ONLY: the raw base64 PAYMENT-REQUIRED header, to sign with any x402 v2 client.
`also_accepted_networks`	No	QUOTE_ONLY: every network the 402 challenge accepts.

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedv0.3.4Sep 29, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": false,
+  "properties": {
+    "also_accepted_networks": {
+      "description": "QUOTE_ONLY: every network the 402 challenge accepts.",
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "how_to_pay": {
+      "description": "QUOTE_ONLY: how to sign and resend the call.",
+      "type": "string"
+    },
+    "mode": {
+      "description": "QUOTE_ONLY: price quote only, nothing signed or charged. PAID: the call was paid and result holds the data. FREE: the endpoint answered without payment.",
+      "enum": [
+        "QUOTE_ONLY",
+        "PAID",
+        "FREE"
+      ],
+      "type": "string"
+    },
+    "paid": {
+      "description": "true only when a payment was settled for this call.",
+      "type": "boolean"
+    },
+    "payment_required_b64": {
+      "description": "QUOTE_ONLY: the raw base64 PAYMENT-REQUIRED header, to sign with any x402 v2 client.",
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "price": {
+      "anyOf": [
+        {
+          "additionalProperties": false,
+          "properties": {
+            "atomic": {
+              "description": "Price in USDC atomic units (6 decimals), as a decimal string.",
+              "type": "string"
+            },
+            "network": {
+              "description": "CAIP-2 network id of the lane, eip155:8453 (Base).",
+              "type": "string"
+            },
+            "payTo": {
+              "description": "Address the payment settles to.",
+              "type": "string"
+            },
+            "usd": {
+              "description": "Price in US dollars.",
+              "type": "number"
+            }
+          },
+          "required": [
+            "atomic",
+            "usd",
+            "payTo",
+            "network"
+          ],
+          "type": "object"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "description": "The Base USDC quote. Present on QUOTE_ONLY and on PAID calls made by a local payer; null when the rail offered no Base USDC lane or the caller signed the payment."
+    },
+    "resource": {
+      "description": "QUOTE_ONLY: the full URL of the paid resource.",
+      "type": "string"
+    },
+    "result": {
+      "description": "PAID or FREE: the endpoint's JSON result."
+    },
+    "settlement": {
+      "description": "PAID: decoded PAYMENT-RESPONSE settlement (transaction hash, network, payer), or null if the rail sent none."
+    },
+    "what_you_get": {
+      "description": "QUOTE_ONLY: the rail's description of what the payment buys.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "mode",
+    "paid"
+  ],
+  "type": "object"
+}

Changed4 schema fields changedv0.3.3Sep 29, 2026

changedInput schema / properties / min_tvl_usd / description

Previous value: -"Minimum pool TVL in USD, e.g. 1000000 to skip small pools."New value: +"Minimum pool TVL in US dollars as a plain number. Defaults to 1000000 ($1M) when omitted."

changedInput schema / properties / project / description

Previous value: -"Filter to one protocol by its slug, e.g. aave-v3. Omit for all protocols."New value: +"Filter to one protocol by its DefiLlama slug, e.g. aave-v3. Omit for all protocols."

changedInput schema / properties / stablecoin_only / description

Previous value: -"true = only stablecoin pools."New value: +"true = only stablecoin pools. Omit or false for all pools."

changedInput schema / properties / token / description

Previous value: -"Filter to pools containing this token symbol, e.g. USDC, ETH, WBTC. Case-insensitive."New value: +"Token symbol that must be in the pool, e.g. USDC, ETH, WBTC."

Changed8 schema fields changedv0.3.2Sep 26, 2026

addedInput schema / properties / chain / description

Added value: +"Filter to one chain by name, e.g. Ethereum, Base, Arbitrum. Omit for all chains."

addedInput schema / properties / limit / description

Added value: +"How many pools to return, 1 to 100."

addedInput schema / properties / min_tvl_usd / description

Added value: +"Minimum pool TVL in USD, e.g. 1000000 to skip small pools."

changedInput schema / properties / payment_signature / description

Previous value: -"Optional. An x402 v2 payment you signed for this call's quote (the PAYMENT-SIGNATURE header value). Omit to get the price quote first."New value: +"Optional. An x402 v2 payment you signed for this call's quote (the PAYMENT-SIGNATURE header value). Omit to get the price quote first; nothing is charged without it."

addedInput schema / properties / project / description

Added value: +"Filter to one protocol by its slug, e.g. aave-v3. Omit for all protocols."

addedInput schema / properties / sort / description

Added value: +"Sort order: 'apy' (highest yield first) or 'tvl' (largest pool first)."

addedInput schema / properties / stablecoin_only / description
```
Added value: +"true = only stablecoin pools."
```

addedInput schema / properties / token / description

Added value: +"Filter to pools containing this token symbol, e.g. USDC, ETH, WBTC. Case-insensitive."

First observedv0.3.1Sep 26, 2026

TDQS

A4.8/5.0

Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations only flag readOnlyHint=false and openWorldHint=true, so the description adds the real behavioral payload: a $0.01 USDC cost, the two-step x402 payment handshake (quote first with no charge, then sign), the DefiLlama source, and an explicit caveat that APYs are variable and backward-looking and not investment advice. That is meaningfully beyond what the annotations convey and is consistent with readOnlyHint=false.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Front-loads purpose, cost, source and filters, then routing, return shape, caveats and payment flow. Dense but each sentence carries information; the return-field enumeration and payment mechanics make it longer than strictly minimal, though nothing is genuinely wasted.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Covers cost, payment protocol, filter interaction, default behavior, routing to alternatives, and return contents. With an output schema present it did not need to enumerate return fields, so doing so is bonus rather than gap; nothing an agent needs to call this correctly is missing.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so the baseline is 3 and the schema already defines each filter, its enum, bounds, and defaults. The description still adds cross-parameter semantics the schema cannot express: filters are optional, combine with AND, and the no-filter behavior defaults to pools above $1M TVL.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource (ranked DeFi yield pools from DefiLlama, 15,000+ pools) plus the filter dimensions and the target question 'where is the best yield for X'. It also explicitly names sibling tools (genesis402_catalog, genesis402_call) for the cases it does not cover, so an agent can route without opening other schemas.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Gives a concrete intended question ('where is the best yield for X'), an explicit alternative path for other DeFi/market data (search genesis402_catalog and call via genesis402_call), and clarifies that all filters are optional and combine with AND, with a defined no-filter default ($1M TVL top pools). That covers when-to-use, when-not, and alternative.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.