Tools AI agents need

Read-only index of services AI agents use to pay and get paid, prove identity, get discovered, place calls, and get evaluated. Facts from public vendor pages with a source on every entry. Not an endorsement, not a ranking, no paid placement. Prices are list prices as shown and change often.

25 services, last built 2026-10-13. Agents can read the same data as JSON or through our read-only MCP server (tool list_bot_tools). Spotted something wrong? Send a correction.

Payments

Rails and wallets agents use to pay for services and get paid.

Coinbase Agentic Wallets / AgentKit

Role: buy-side wallet for agents
Live: yes
Fees: wallet creation free (details as listed by the builder)
Maturity: developer toolkit
Details: as listed by the builder
Sources: docs.cdp.coinbase.com

Google AP2 (+ A2A x402 extension)

Role: authorization/mandate layer over cards or x402
Live: spec v0.2, pre-1.0
Maturity: pre-1.0
Sources: github.com, github.com

Mastercard Agent Pay

Role: card-network agentic tokens via acquirers
Live: live authenticated transactions in several markets
Maturity: early-live
Sources: newsroom.mastercard.com

Role: sell-side rail: charge agents per call, settles in fiat
Live: yes (US; stablecoins not in NY)
Fees: stablecoin 1.5%; cards 2.9% + 30c
Minimums: cards via SPT $0.50; stablecoin 0.01 USDC
Disputes: none for stablecoin payments
Maturity: new; Stripe labels it Frontier, MCP pattern experimental
Sources: docs.stripe.com, stripe.com, docs.stripe.com, docs.stripe.com

Visa Intelligent Commerce / Trusted Agent Protocol

Role: card-network agent credentials via partners
Live: pilots / closed beta
Maturity: early
Sources: usa.visa.com

x402 (open HTTP 402 standard; Coinbase CDP facilitator and others)

Role: per-request micropayments in USDC
Live: yes
Fees: no protocol fee; CDP facilitator 1,000 settlements/month free then $0.001 each
Maturity: live but small and concentrated (third-party stats)
Sources: docs.cdp.coinbase.com, docs.cdp.coinbase.com

Identity

Ways for an agent to prove who it is, or who stands behind it, when it signs in or makes a request.

AgentID by AgentMail

Role: OpenID Connect provider: agents sign into apps with their own verified email; returns a stable agent identifier and, for registered apps, the owning human's email
Mechanism: agent enrolls once in a browser; signing key created and kept
Pricing: 'free for apps to add'
Sources: www.agentmail.to

Auth0 for AI Agents (Okta)

Role: AI identity for B2B and commerce: auth at each step, Token Vault, verified agentic checkout
Pricing: not confirmed: AI-agent pricing not found in text of the pricing page
Sources: auth0.com, auth0.com

Cloudflare Web Bot Auth (signed agents / verified bots)

Role: HTTP message signatures: agent hosts a key directory, registers with Cloudflare, then signs requests so sites can verify it
Pricing: not stated on the doc page; registration is via the Cloudflare dashboard
Updated: doc last updated Oct 8, 2026
Sources: developers.cloudflare.com

Moltbook identity tokens

Role: agent identity tokens
Live: yes
Maturity: early; security caution
Risk note: Wiz reported an exposed database with API keys that allowed impersonation
Sources: www.moltbook.com, www.wiz.io

Skyfire KYAPay

Role: verified agent identity + payment tokens (JWT kya/pay/kya-pay)
Live: yes
Fees: not public
Maturity: early
Sources: docs.skyfire.xyz

World AgentKit (Beta)

Role: extends x402 so sites can distinguish human-backed agents from bots; agent wallet registered in AgentBook resolves to an anonymous human identifier
Pricing: no price stated; docs mention a 'free-trial mode with 3 uses'
Status: Beta
Sources: docs.world.org

Discovery

Registries and directories where agents find tools and services.

Coinbase x402 Bazaar

Role: catalog of payment-gated services discovered by the CDP Facilitator; searchable by intent via CDP SDK, HTTP API, or Bazaar MCP
Listing: services are discovered via the CDP Facilitator (no separate submit form seen)
Pricing: listing price not stated; CDP facilitator 1,000 settlements/month free then $0.001 each
Sources: docs.cdp.coinbase.com, docs.cdp.coinbase.com

MPP services directory (mpp.dev)

Role: curated directory of APIs accepting MPP payments (e.g. OpenAI, OpenRouter, Agentfax)
Listing: 'curated directory accepts live, production-ready MPP services' (submission steps on the page)
Pricing: no listing fee stated
Sources: mpp.dev

Official MCP Registry

Role: free metadata listing agents use to discover MCP servers
Live: preview (data resets may occur)
Sources: registry.modelcontextprotocol.io, github.com

Tradey receptionist feed (JSON + MCP)

Operated by Tradey.com (publisher of this index).

Role: comparison of AI receptionists: self-reported vendor facts with source links (not Tradey-verified)
Live: yes
Sources: tradey.com

Telephony and voice

Providers agents use to get phone numbers and place or answer calls.

Bland AI

Role: enterprise voice AI platform
Pricing: Start: $0.14/min, $0 platform fee, $0.05/transfer min, 100 calls/day; Build: $0.12/min + $299/mo platform fee, $0.04/transfer min; Enterprise custom
Free tier: 2 credits + inbound number (vendor says $15/mo value), no card
Sources: www.bland.ai

Retell AI

Role: developer voice-agent platform
Pricing: $0.07-$0.31/min voice agents pay-as-you-go (Retell voice infra $0.055/min + TTS e.g. $0.015/min platform voices to $0.10/min ElevenLabs v3 + LLM); chat $0.002+/msg; 20 concurrent calls included
Free tier: $10 free credits
Sources: www.retellai.com

Telnyx Voice API (Call Control)

Role: carrier/CPaaS with own network
Pricing: $0.002/min Voice API + SIP trunking fee (example: outbound $0.005/min, inbound $0.0032/min); call recording $0.002/min; $0 platform fee
Example cost: $628/mo for 100,000 min, 60% outbound (vendor example, pre-volume tiers)
Sources: telnyx.com

Twilio Programmable Voice

Role: carrier/CPaaS: numbers, PSTN, SIP
Pricing: US local: make $0.0140/min, receive $0.0085/min; toll-free receive $0.0220/min; SIP/browser $0.0040/min; local number $1.15/mo, toll-free $2.15/mo
Free tier: free trial with $15 credit
Sources: www.twilio.com

Vapi

Role: developer voice-agent platform (orchestration)
Pricing: $0.05/min Vapi hosting, pre-paid; models/telephony pass-through at cost (e.g. Deepgram $0.0095-$0.0099/min, ElevenLabs $0.0146-$0.0238/min); Core $29/mo package; Pro $999/mo minimum; HIPAA/BAA $2,000/mo; extra concurrency $10/line/mo
Free tier: $5 free credits
All in note: Bland's page claims typical Vapi stacks run ~$0.13-$0.30/min all-in
Sources: vapi.ai, www.bland.ai

Evals and verification

Services that test or verify how voice agents perform.

Cekura

Role: voice-agent testing and call monitoring
Pricing: Pay as you go: $0.25/voice testing min, $0.05/monitored call, $0.025/reply, first user free, $30/mo per extra seat; Startup $500/mo; Enterprise custom
Free tier: start free, no card
Sources: www.cekura.ai

Coval

Role: simulation, monitoring and evals for voice/chat agents
Pricing: Starter $100/mo (100 simulation min, 1,000 monitored calls); Growth $500/mo (1,000 sim min, 10,000 monitored); Enterprise from $4,500/mo; overage $0.40/$0.25 per sim min, $0.10/$0.05 per monitoring min
Free tier: 7-day free trial, card required
Sources: www.coval.dev

Hamming AI

Role: automated voice-agent testing and production call analytics
Pricing: not public: Agency and Startup tiers are 'Contact us'
Sources: hamming.ai

Voice Agent Index

Role: editorial directory + benchmark protocols; vendor-submitted evidence packets
Pricing: no prices, listing fee or sponsorship rates published; /pricing returns 404
Status: results matrix shows no scored results yet ('Needs evidence packet' / 'Test pending')
Ownership: not public; domain registered 2026-06-15 via Cloudflare, registrant redacted
Sources: voiceagentindex.com, voiceagentindex.com, voiceagentindex.com, voiceagentindex.com, rdap.verisign.com

Notes

All prices fetched 2026-10-13 ~01:20 PT from vendor pages; volatile.
Bland's comparison of Vapi/Retell all-in costs is a competitor claim, unverified.
Hamming and Voice Agent Index prices not public.
Auth0, Cloudflare Web Bot Auth, World AgentKit and listing prices not confirmed.
Facts are from public vendor docs or labeled third-party sources as of 2026-10-12/13. Not an endorsement; no paid placement. Volume figures are rough and sources disagree. Telephony/evals/identity/discovery prices fetched from vendor pages 2026-10-13; volatile; unverified prices are marked as such.