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APIs / Developer Tools / Apidapp / ApiDapp
ApiDapp logo

ApiDapp

Browse all Apidapp APIs
56
AI ReadinessFoundational (C)56/100
See full scorecard
Agent-ready OpenAPI document · curated by JenticDeveloper ToolsPackage RegistryapiKey30 EndpointsREST

Know of an official OpenAPI document? Contribute it →

For Agents

Read Ethereum accounts, blocks, transactions, ERC-20 balances, and contracts over REST without running a node or speaking JSON-RPC.

Use for: Get the ETH balance for an Ethereum address, List all transactions in block 18000000 on Ethereum mainnet, Retrieve the ERC-20 balance of a token for a specific holder, Call a read-only function on a deployed Ethereum contract

Not supported: Does not handle private key custody for user wallets, cross-chain bridging, or non-Ethereum networks - use for Ethereum read and write operations over REST only.

Jentic publishes the only available OpenAPI specification for ApiDapp, keeping it validated and agent-ready. ApiDapp is a REST gateway for Ethereum that lets clients read accounts, blocks, blockchains, contracts, ERC-20 tokens, transactions, and wallets without running a full node or speaking JSON-RPC. The API exposes 30 operations across 26 paths so a developer can list block transactions, read an ERC-20 balance, deploy or call a contract, and manage an embedded wallet through plain HTTP. It targets dapp builders who want a hosted Ethereum read/write surface and prefer REST over the standard web3 RPC interface.

Jentic One on GithubView OpenAPI Document

Install Jentic One Beta

Connect the ApiDapp to your agent

Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the ApiDapp, or any other public or private API you need. You set the rules, the agent never sees your credentials, and every call is logged.

Two steps, two machines. Install the instance in a safe environment, then register your agent from wherever it runs.

1

Step 1: Jentic One Host machine

# On the machine that will host your Jentic One instance:
curl -fsSL "https://jentic.com/install.sh?src=apis&api=%2Fapis%2Fapidapp.com%2Fapidapp-apidapp" | sh
2

Step 2: Agent machine

# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL "https://jentic.com/install.sh?src=apis&api=%2Fapis%2Fapidapp.com%2Fapidapp-apidapp" | sh
jentic register       # connects your agent to your Jentic One instance

Jentic One is in public beta. The setup above keeps your agent separate from the instance, which is what you want before using real credentials: an agent running as the same OS user as Jentic One can read its stored keys directly. Just evaluating? A single local install is fine to start. See the secure deployment guide for the tiers.

Capabilities

What an agent can do with ApiDapp API.

Fetch account balances and transaction history for any Ethereum address over REST

Read block headers and the transactions inside a block by index or hash

Read and write ERC-20 token balances and transfers without crafting raw RPC calls

Call read-only contract methods and submit signed transactions via HTTP

Manage server-side wallets including key generation and signing

Inspect blockchain metadata such as the current chain, version, and node status

Use Cases

Patterns agents use ApiDapp API for, with concrete tasks.

★ Wallet Balance Display

Show the ETH and ERC-20 holdings for a user-supplied address inside an app without running an Ethereum node. ApiDapp's /account/{id} endpoint returns the ETH balance and /erc20 endpoints return token balances for the same address. This pattern is common for portfolio trackers and wallet UIs that want to onboard in hours rather than provisioning Geth or paying for an RPC subscription up front.

GET /account/0xAbC123... to read the ETH balance and then GET /erc20/{contract}/balance/0xAbC123... for the USDC balance

Block and Transaction Indexing

Walk the chain block by block to build a custom index of transactions, contract calls, or token transfers. ApiDapp's /block/{id} endpoint returns block content and /block/{id}/transaction lists the transactions inside that block, so a small worker can ingest data without parsing raw RLP or running a full archive node.

GET /block/18000000/transaction to list the transactions in block 18000000 and store the from/to/value tuple for each

Smart Contract Interaction

Call read-only functions on a deployed Ethereum contract or submit a signed transaction without writing web3.js or ethers boilerplate. ApiDapp's /contract endpoints accept the contract address and method name and return the decoded result. For state-changing calls, the API accepts a signed transaction so private keys can stay in a hardware wallet or signer service.

POST to /contract/{address} with the method name 'balanceOf' and an address argument to read the holding without sending a transaction

AI Agent On-Chain Queries

Give an AI agent a tool to answer on-chain questions like 'what's the ETH balance of vitalik.eth?' or 'is this transaction confirmed?'. Through Jentic, the agent searches for an intent and gets the matching ApiDapp operation. The agent can answer without the developer wiring a JSON-RPC client or running a node.

Search Jentic for 'get ethereum account balance', load the /account/{id} schema, and execute with id=0xAbC... to return the current ETH balance

Key Endpoints

30 endpoints — jentic publishes the only available openapi specification for apidapp, keeping it validated and agent-ready.

METHOD

PATH

DESCRIPTION

GET

/account/{id}

Fetch ETH balance and metadata for an address

GET

/block/{id}

Read a block by number or hash

GET

/block/{id}/transaction

List transactions inside a block

GET

/contract

List or look up deployed contracts known to ApiDapp

GET

/blockchain

Read chain metadata and latest state

GET

/wallet

List server-side wallets

GET

/account/{id}

Fetch ETH balance and metadata for an address

GET

/block/{id}

Read a block by number or hash

GET

/block/{id}/transaction

List transactions inside a block

GET

/contract

List or look up deployed contracts known to ApiDapp

GET

/blockchain

Read chain metadata and latest state

GET

/wallet

List server-side wallets

Jentic AI Readiness Score

This API is usable in Jentic One now. Its AI-readiness score against Jentic's framework shows where it stands today and where improvements would make it even easier for agents to use.

A

ApiDapp

- Foundational (C)
56/100
93
Foundational Compliance
56
Developer Experience & Jentic Compatibility
33
AI-Readiness & Agent Experience
93
Agent Usability
50
Security
100
AI Discoverability
Powered by JenticScoring Framework 1.0.0 | Scoring Engine 0.4.0
Show dimension breakdown
93

Foundational Compliance

Base layer of spec validity and structural soundness.

Grade: A+Signals: 4
97%

Lint Results

Aggregated quality score from linter diagnostics, weighted by severity.

100%

Resolution Completeness

Percentage of `$ref` references that resolve successfully.

100%

Specification Validity

Checks whether the API description parses successfully and conforms to its declared specification (e.g., OpenAPI).

75%

Structural Integrity

Structural correctness score based on schema issues using logarithmic dampening.

56

Developer Experience & Jentic Compatibility

Clarity, completeness, and ingestion readiness for developers and tooling.

Grade: CSignals: 4
0%

Example Density

How richly the API is illustrated with examples.

100%

Example Validity

Percentage of examples that conform to their schemas.

25%

Response Coverage

Percentage of operations with complete response definitions (success, client error, server error).

100%

Tooling Readiness

Health of API ingestion, bundling, and resolution within Jentic pipelines.

33

AI-Readiness & Agent Experience

Semantic breadth, depth, and agent comprehension for AI systems.

Grade: FSignals: 4
32%

Description Coverage

Coverage of descriptions across API elements.

0%

Error Standardization

Coverage of RFC 9457 Problem Details for error responses.

98%

OperationId Quality

Coverage, uniqueness, and casing consistency of operationIds for AI inference.

0%

Summary Coverage

Coverage of summaries across operations/tags/info.

93

Agent Usability

Functional utility, complexity comfort, and AI orchestration readiness.

Grade: A+Signals: 1
93%

Complexity Comfort

Agent comfort level based on API operational and structural complexity.

50

Security

Trust, risk posture, and security compliance.

Grade: C-Signals: 1
50%

Authentication Strength

Average quality of security schemes based on authentication method strength (weakest link for OAuth2).

100

AI Discoverability

Findability, semantic richness, and reasoning readiness.

Grade: A+Signals: 1
100%

Descriptive Richness

Clarity and depth of descriptions across API elements.

View full reportHow the score is calculatedMore about the dimensions

Score it yourself

Every API in the directory is allowlisted, so you can re-score it with no key required.

Score your own APIScoring CLI agent skill
npx @jentic/api-scorecard-cli score <openapi-url>

Why Jentic?

What agents get from Jentic-routed access to this vendor.

Setup

Wiring ApiDapp by hand means setting up its API key, learning its Ethereum account, block, and contract resource shapes, and framing on-chain reads over REST yourself. Through Jentic you install once, import ApiDapp from the API Directory, store the key once, and your agent calls it.

Permission scoping

ApiDapp puts the account and block id in the URL path (/account/{id}, /block/{id}), so a rule can pin your agent to one account or block for reads and nothing else. You choose the operations it may call, so write operations are not included unless you add them.

Credential isolation

Your ApiDapp key is stored once, encrypted, by your own Jentic One instance and injected at execution time. It never enters the agent's prompt, logs, or context.

Intent-based discovery

Agents search Jentic by intent such as 'read an Ethereum account balance' or 'get transactions in a block', and Jentic returns the matching ApiDapp operation with its input schema so the agent calls the right endpoint without browsing the reference docs.

Related APIs

Alternatives and complements available in the Jentic catalogue.

Alternative

Alchemy API

→

Production-grade Ethereum and multi-chain node infrastructure as a service

Choose Alchemy when the agent needs production reliability, archive data, enhanced webhooks, or multi-chain coverage that ApiDapp's REST layer does not provide

Alternative

QuickNode API

→

Hosted Ethereum and multi-chain RPC with a managed dashboard and add-on marketplace

Choose QuickNode when the agent needs low-latency RPC, dedicated endpoints, or chain coverage beyond Ethereum mainnet

Alternative

Ankr API

→

Decentralised RPC service across Ethereum and many other chains

Choose Ankr when the agent needs broad multi-chain support and a free tier for prototyping rather than a single-network REST surface

FAQs

Specific to using ApiDapp API through Jentic.

Why is there no official OpenAPI spec for ApiDapp?

ApiDapp does not publish an OpenAPI specification. Jentic generates and maintains this spec so that AI agents and developers can call ApiDapp via structured tooling. It is validated against the live API and kept up to date. Get started with Jentic One, the self-hosted execution layer.

What authentication does the ApiDapp use?

ApiDapp uses an API key passed in the X-Api-Key request header. Through Jentic, the key is stored encrypted in your Jentic One instance and injected at execution time, so the raw key never appears in the agent's prompt or logs.

Can I read an ERC-20 balance with this API?

Yes. The /erc20 endpoints expose token metadata and balances by token contract address. For a specific holder, use the per-token balance endpoint with the contract address and the holder address - much shorter than encoding a balanceOf call into raw JSON-RPC.

Which Ethereum networks does the ApiDapp cover?

The base URL https://ethereum.apidapp.com/1 targets Ethereum mainnet (chain id 1). Other networks are not declared in the OpenAPI spec; check the ApiDapp website for any current testnet endpoints.

What are the rate limits for the ApiDapp?

The OpenAPI spec does not encode hard limits. Standard practice for REST gateways onto Ethereum is to throttle at the API key level and return HTTP 429 on overage, so agents calling through Jentic should retry with backoff on 429.

How do I look up a transaction status with the ApiDapp through Jentic?

Search Jentic for 'check ethereum transaction status', load the /transaction/{id} schema, and execute with id set to the transaction hash. The response surfaces the confirmation count and the receipt status, so the agent can branch on whether the tx is mined.

Can I limit what my agent is allowed to do with the ApiDapp API?

Yes. Because you run Jentic One yourself, you decide which ApiDapp operations your agent may call, so read-only calls like GET /account/{id} and GET /block/{id} can be permitted while write operations such as submitting signed transactions or creating wallets stay off unless you add them. Since the account and block id sit in the URL path, your own rules can pin the agent to a single account or block and nothing else. Your stored ApiDapp key is injected only at execution time, so the agent never sees or handles the raw credential.

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View OpenAPI Document