diff --git a/cspell.json b/cspell.json
index a8d935375..392450dfc 100644
--- a/cspell.json
+++ b/cspell.json
@@ -58,6 +58,7 @@
     "Merkle",
     "microether",
     "milliether",
+    "offchain",
     "pako",
     "payloadset",
     "Promisable",
diff --git a/packages/payloadset/packages/api/src/Payload.ts b/packages/payloadset/packages/api/src/Payload.ts
index 95c63d2bf..3b0ca2354 100644
--- a/packages/payloadset/packages/api/src/Payload.ts
+++ b/packages/payloadset/packages/api/src/Payload.ts
@@ -1,5 +1,5 @@
 import { Hash } from '@xylabs/hex'
-import { AsObjectFactory } from '@xyo-network/object'
+import { AsObjectFactory, JsonArray, JsonObject } from '@xyo-network/object'
 import { isPayloadOfSchemaType, Payload } from '@xyo-network/payload-model'
 
 export const ApiCallSchema = 'network.xyo.api.call'
@@ -38,7 +38,9 @@ export interface HttpMeta {
   status?: number
 }
 
-export type ApiCallJsonResult<T extends object | [] = object> = Payload<
+export type ApiCallJsonResultType = JsonArray | JsonObject
+
+export type ApiCallJsonResult<T extends ApiCallJsonResultType = ApiCallJsonResultType> = Payload<
   {
     call: Hash
     contentType: 'application/json'
@@ -64,7 +66,10 @@ export type ApiCallErrorResult = Payload<
   ApiCallResultSchema
 >
 
-export type ApiCallResult = ApiCallBase64Result | ApiCallJsonResult | ApiCallErrorResult
+export type ApiCallResult<TJson extends JsonArray | JsonObject = JsonArray | JsonObject> =
+  | ApiCallBase64Result
+  | ApiCallJsonResult<TJson>
+  | ApiCallErrorResult
 
 export const isApiCall = isPayloadOfSchemaType(ApiCallSchema)
 export const asApiCall = AsObjectFactory.create(isApiCall)
diff --git a/packages/payloadset/packages/api/src/Witness.ts b/packages/payloadset/packages/api/src/Witness.ts
index a7a88f003..dc5883ef4 100644
--- a/packages/payloadset/packages/api/src/Witness.ts
+++ b/packages/payloadset/packages/api/src/Witness.ts
@@ -3,7 +3,6 @@ import { Axios, AxiosError, AxiosJson } from '@xylabs/axios'
 import { Hash } from '@xylabs/hex'
 import { AbstractWitness } from '@xyo-network/abstract-witness'
 import { PayloadHasher } from '@xyo-network/hash'
-import { JsonArray, JsonObject } from '@xyo-network/object'
 import { isPayloadOfSchemaType } from '@xyo-network/payload-model'
 import { WitnessParams } from '@xyo-network/witness-model'
 import { fromByteArray } from 'base64-js'
@@ -16,6 +15,7 @@ import {
   ApiCallBase64Result,
   ApiCallErrorResult,
   ApiCallJsonResult,
+  ApiCallJsonResultType,
   ApiCallResult,
   ApiCallResultSchema,
   ApiCallSchema,
@@ -116,7 +116,7 @@ export class ApiCallWitness<TParams extends ApiCallWitnessParams = ApiCallWitnes
       switch (this.accept) {
         case 'application/json': {
           const axios = new AxiosJson({ headers: this.params.headers, timeout: this.timeout })
-          const response = await axios.get<JsonArray | JsonObject>(url)
+          const response = await axios.get<ApiCallJsonResultType>(url)
           if (response.status >= 200 && response.status < 300) {
             const jsonResult = result as ApiCallJsonResult
             jsonResult.data = response.data
diff --git a/packages/payloadset/packages/api/src/spec/opensea.nft-call.spec.ts b/packages/payloadset/packages/api/src/spec/opensea.nft-call.spec.ts
index b5d0ad09b..bb01a4f6e 100644
--- a/packages/payloadset/packages/api/src/spec/opensea.nft-call.spec.ts
+++ b/packages/payloadset/packages/api/src/spec/opensea.nft-call.spec.ts
@@ -1,5 +1,4 @@
 /* eslint-disable max-statements */
-
 import { describeIf } from '@xylabs/jest-helpers'
 import { HDWallet } from '@xyo-network/account'
 import { ManifestWrapper, PackageManifestPayload } from '@xyo-network/manifest'
@@ -8,7 +7,7 @@ import { isPayloadOfSchemaType } from '@xyo-network/payload-model'
 import { asSentinelInstance } from '@xyo-network/sentinel-model'
 import { asWitnessInstance } from '@xyo-network/witness-model'
 
-import { ApiCallJsonResult, ApiCallResult, ApiCallResultSchema, ApiCallSchema, ApiUriTemplateCall } from '../Payload'
+import { ApiCallJsonResult, ApiCallResultSchema, ApiCallSchema, ApiUriTemplateCall } from '../Payload'
 import { ApiCallWitness } from '../Witness'
 import openseaNftsManifest from './opensea.nft-call.json'
 
@@ -18,6 +17,60 @@ describe('OpenSeaApi', () => {
   const apiKey = process.env.OPENSEA_API_KEY
 
   describeIf(apiKey)('report', () => {
+    type OpenSeaNft = {
+      /*
+       * Collection slug. A unique string to identify a collection on OpenSea
+       */
+      collection: string
+      /*
+       * The unique public blockchain identifier for the contract
+       */
+      contract: string
+      /**
+       * @deprecated
+       */
+      created_at: string
+      /*
+       * Description of the NFT
+       */
+      description: string
+      /*
+       * The NFT's unique identifier within the smart contract (also referred to as token_id)
+       */
+      identifier: string
+      /*
+       * Link to the image associated with the NFT
+       */
+      image_url: string
+      /*
+       * If the item is currently able to be bought or sold using OpenSea
+       */
+      is_disabled: boolean
+      /*
+       * If the item is currently classified as 'Not Safe for Work' by OpenSea as defined in OpenSea's NSFW Policy.
+       */
+      is_nsfw: boolean
+      /*
+       * Link to the offchain metadata store
+       */
+      metadata_url: string
+      /*
+       * Name of the NFT
+       */
+      name: string
+      /*
+       * ERC standard of the token (erc721, erc1155)
+       */
+      token_standard: string
+      /*
+       * Last time that the NFT's metadata was updated by OpenSea
+       */
+      updated_at: string
+    }
+    type OpenSeaListNftsByAccountResponse = {
+      next: string
+      nfts: OpenSeaNft[]
+    }
     it('specifying address', async () => {
       const mnemonic = 'later puppy sound rebuild rebuild noise ozone amazing hope broccoli crystal grief'
       const wallet = await HDWallet.fromPhrase(mnemonic)
@@ -51,11 +104,11 @@ describe('OpenSeaApi', () => {
 
       const report = await sentinel?.report([call])
 
-      const apiCallResult = report?.find(isPayloadOfSchemaType(ApiCallResultSchema)) as ApiCallResult | undefined
-
+      const apiCallResult = report?.find(isPayloadOfSchemaType<ApiCallJsonResult<OpenSeaListNftsByAccountResponse>>(ApiCallResultSchema))
+      expect(apiCallResult).toBeDefined()
       expect(apiCallResult?.schema).toBeString()
-      // eslint-disable-next-line @typescript-eslint/no-explicit-any
-      expect((apiCallResult as ApiCallJsonResult<any>)?.data.nfts).toBeArrayOfSize(1)
+      expect(apiCallResult?.data.nfts).toBeArrayOfSize(1)
+      expect(apiCallResult?.data.nfts[0].collection).toBeString()
     })
   })
 })