KnownFix

Redeem a fix

get_fix

Get or redeem a fix after search_fixes or list_catalog identifies the id. Free samples return immediately. For a paid fix, call with the id alone to receive a free diagnosis preview, confidence and compatibility, dollar price, signed Base Pay USDC and exact-ETH offers, and one pay-and-redeem action; then call once more with the matching paymentTx and private paymentOffer. Never pay again merely because an existing proof is pending or denied.

Input Schema

TableJSON Schema

Name	Required	Description
`id`	Yes	Fix id from search_fixes or list_catalog
`paymentTx`	No	Base Pay UserOperation hash for USDC or Base transaction hash for ETH; omit for free samples.
`paymentOffer`	No	Private signed bearer token from search_fixes or get_offer; omit for free samples and never publish it.

Output Schema

TableJSON Schema

Name	Required	Description
`id`	No
`fix`	No
`tier`	No
`cause`	No
`error`	No
`fixId`	No
`title`	No
`denied`	No
`receipt`	No	Machine-readable receipt derived by KnownFix after signed-offer and Base proof verification; never accepted from caller input.
`citation`	No
`purchase`	No
`nextAction`	No

Schema Changelog

Changes observed during successful MCP inspections. Dates show when Glama detected each change.

Changed1 schema field changedAug 31, 2026

addedOutput schema / properties / receipt

Added value: +{
+  "additionalProperties": false,
+  "description": "Machine-readable receipt derived by KnownFix after signed-offer and Base proof verification; never accepted from caller input.",
+  "properties": {
+    "custody_model": {
+      "enum": [
+        "direct-settlement"
+      ],
+      "type": "string"
+    },
+    "lifecycle": {
+      "additionalProperties": false,
+      "properties": {
+        "authorization": {
+          "enum": [
+            "offer-verified"
+          ],
+          "type": "string"
+        },
+        "fulfillment": {
+          "enum": [
+            "pending",
+            "released",
+            "declined"
+          ],
+          "type": "string"
+        },
+        "settlement": {
+          "enum": [
+            "confirmed"
+          ],
+          "type": "string"
+        }
+      },
+      "required": [
+        "authorization",
+        "settlement",
+        "fulfillment"
+      ],
+      "type": "object"
+    },
+    "proof": {
+      "additionalProperties": false,
+      "properties": {
+        "chain_id": {
+          "const": 8453,
+          "type": "integer"
+        },
+        "network": {
+          "enum": [
+            "base-mainnet"
+          ],
+          "type": "string"
+        },
+        "type": {
+          "enum": [
+            "erc-4337-user-operation-hash",
+            "transaction-hash"
+          ],
+          "type": "string"
+        }
+      },
+      "required": [
+        "network",
+        "chain_id",
+        "type"
+      ],
+      "type": "object"
+    },
+    "reversal_supported": {
+      "const": false,
+      "type": "boolean"
+    },
+    "scheme": {
+      "enum": [
+        "base-pay-usdc",
+        "base-exact-eth"
+      ],
+      "type": "string"
+    },
+    "spec": {
+      "enum": [
+        "knownfix-payment-receipt/1.0"
+      ],
+      "type": "string"
+    }
+  },
+  "required": [
+    "spec",
+    "scheme",
+    "custody_model",
+    "reversal_supported",
+    "lifecycle",
+    "proof"
+  ],
+  "type": "object"
+}

Changed2 schema fields changedAug 27, 2026

addedOutput schema / properties / purchase / properties / recommendation

Added value: +{
+  "additionalProperties": true,
+  "description": "Demand evidence and matched-fix context when a multi-fix pack is the recommended purchase.",
+  "type": "object"
+}

addedOutput schema / properties / purchase / properties / singleFixAlternative

Added value: +{
+  "additionalProperties": true,
+  "description": "Lower-cost individual-fix fallback when the recommended product is a bundle.",
+  "type": "object"
+}

Changed12 schema fields changedAug 27, 2026

addedOutput schema / properties / cause
```
Added value: +{
+  "type": "string"
+}
```

addedOutput schema / properties / citation

Added value: +{
+  "additionalProperties": true,
+  "type": "object"
+}

addedOutput schema / properties / denied

Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

removedOutput schema / properties / detail

Removed value: -{
-  "description": "Human-readable error or status detail.",
-  "type": "string"
-}

removedOutput schema / properties / error / description

Removed value: -"Machine-readable error code, when the operation did not complete."

addedOutput schema / properties / fix

Added value: +{
+  "additionalProperties": true,
+  "type": "object"
+}

addedOutput schema / properties / fixId
```
Added value: +{
+  "type": "string"
+}
```
addedOutput schema / properties / id
```
Added value: +{
+  "type": "string"
+}
```

addedOutput schema / properties / nextAction

Added value: +{
+  "additionalProperties": true,
+  "type": "object"
+}

addedOutput schema / properties / purchase

Added value: +{
+  "additionalProperties": true,
+  "properties": {
+    "checkout": {
+      "description": "Whether both signed payment rails were issued.",
+      "enum": [
+        "ready",
+        "unavailable"
+      ],
+      "type": "string"
+    },
+    "compatibility": {
+      "additionalProperties": true,
+      "type": "object"
+    },
+    "confidence": {
+      "type": "string"
+    },
+    "diagnosisPreview": {
+      "additionalProperties": true,
+      "description": "Free diagnosis and triage for an individual paid fix.",
+      "type": "object"
+    },
+    "nextAction": {
+      "additionalProperties": true,
+      "description": "The single recommended payment or retry action.",
+      "type": "object"
+    },
+    "payment": {
+      "additionalProperties": true,
+      "description": "Preferred Base Pay parameters and signed exact-ETH alternative.",
+      "type": "object"
+    },
+    "price": {
+      "additionalProperties": true,
+      "description": "Dollar-denominated price presented before payment.",
+      "type": "object"
+    },
+    "product": {
+      "additionalProperties": true,
+      "description": "Free skill or bundle outline and product identity.",
+      "type": "object"
+    },
+    "relatedBundle": {
+      "additionalProperties": true,
+      "type": "object"
+    },
+    "signedPurchaseOffer": {
+      "additionalProperties": true,
+      "description": "Private product-bound Base Pay USDC offer.",
+      "type": "object"
+    }
+  },
+  "required": [
+    "checkout",
+    "price",
+    "nextAction"
+  ],
+  "type": "object"
+}

addedOutput schema / properties / tier
```
Added value: +{
+  "type": "string"
+}
```
addedOutput schema / properties / title
```
Added value: +{
+  "type": "string"
+}
```

Changed1 schema field changedAug 27, 2026

changedInput schema / properties / paymentTx / description

Previous value: -"Base-mainnet transaction hash returned by Base Pay or your ETH wallet; omit for free samples."New value: +"Base Pay UserOperation hash for USDC or Base transaction hash for ETH; omit for free samples."

Changed5 schema fields changedAug 27, 2026

changedInput schema / properties / paymentOffer / description

Previous value: -"Signed bearer token from get_offer (omit for samples; keep private)"New value: +"Private signed bearer token from search_fixes or get_offer; omit for free samples and never publish it."

addedInput schema / properties / paymentOffer / maxLength
```
Added value: +2048
```

changedInput schema / properties / paymentTx / description

Previous value: -"0x-prefixed tx hash of your on-chain payment (omit for samples)"New value: +"Base-mainnet transaction hash returned by Base Pay or your ETH wallet; omit for free samples."

addedInput schema / properties / paymentTx / pattern
```
Added value: +"^0x[0-9a-fA-F]{64}$"
```

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "additionalProperties": true,
+  "properties": {
+    "detail": {
+      "description": "Human-readable error or status detail.",
+      "type": "string"
+    },
+    "error": {
+      "description": "Machine-readable error code, when the operation did not complete.",
+      "type": "string"
+    }
+  },
+  "type": "object"
+}

Changed1 schema field changedAug 23, 2026

addedInput schema / properties / paymentOffer

Added value: +{
+  "description": "Signed bearer token from get_offer (omit for samples; keep private)",
+  "type": "string"
+}

First observedAug 14, 2026

TDQS

A4.1/5.0

Behavior4/5

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

Annotations indicate a non-read-only, non-idempotent operation, and the description adds useful behavioral detail: free samples return immediately, paid fixes involve a diagnosis preview plus pay-and-redeem action, and users must not pay again if a proof is pending or denied. This goes beyond the annotations without contradicting them.

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?

The description is dense but front-loaded with the main purpose, followed by the free/paid flow and a safety warning. Every sentence carries necessary information, though the paid-fix sentence is long and could benefit from bullet formatting.

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

Completeness4/5

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

Given the complexity of a two-step paid flow, the description covers the required call sequence, parameter usage, security note about the private token, and the free-sample case. An output schema exists so return values do not need elaboration, and no critical invocation detail appears missing.

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

Parameters3/5

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

Schema coverage is 100%, and the schema already describes each parameter, including origins and when to omit payment fields. The description reinforces sequencing but does not add substantial semantic meaning beyond what the input schema provides.

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?

Description states the specific action 'Get or redeem a fix' and the resource (a fix identified via search_fixes or list_catalog). It clearly distinguishes this tool from search/list siblings and clarifies the two-step paid redemption flow.

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

Usage Guidelines4/5

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

Provides explicit context: fixes come from search_fixes or list_catalog, free samples return immediately, and paid fixes require an initial id-only call followed by a second call with paymentTx and paymentOffer. It does not explicitly state when to prefer an alternative like get_offer, but the flow is clearly scoped.

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

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TDQS

A4.4/5.0

Disambiguation4/5

Most tools target clearly distinct resources or actions, and cross-references like 'use get_fix instead' sharply reduce confusion. A minor source of ambiguity is the cluster of redemption/offer tools (get_fix, get_skill, get_offer) and the three status-check tools, but their descriptions disambiguate them well.

Naming Consistency5/5

All tools follow a consistent lowercase snake_case verb_noun pattern: audit_, check_, get_, list_, order_, request_, search_, submit_. The naming style is uniform and predictable across different domains.

Tool Count4/5

At 17 tools, the surface is slightly above the ideal 3-15 range but remains justified given the server's broad scope: catalog browsing, paid redemption, audits, services, requests, submissions, and checkout support. It is dense but not bloated.

Completeness4/5

The lifecycle coverage is strong: discover, get, request, submit, check status, order, pay, and redeem are all represented. Minor gaps exist, such as no cancellation/refund path, no way to update a submitted fix, and merch ordering delegated entirely to an external storefront.

Redeem a fix

Input Schema

Output Schema

Schema Changelog

TDQS

Glama MCP Gateway

TDQS

Resources