Narrate long-form text - articles, newsletters, audiobook chapters up to 50,000 characters, English (6 voices) and Korean. Submit text, get a jobId instantly, poll /paid/jobs/{jobId} and download the mp3 from its audioUrl (free). Usage-based billing: $0.003 per minute of generated audio, authorized at a $0.36 ceiling and settled at the measured length. Failed jobs are never charged. For short snippets under 2,000 chars, Text-to-speech — short returns audio instantly.
The seven checks, with their evidence
7 recordedRegistered?rung 1 · registered
passThe agent exists in the on-chain registry, with an owner and a document URL.
passed
- block_number
- 52281733
- chain_id
- 8453
- token_id
- 64015
checked at 2026-10-07T16:54:56.793472Z
Reachable?rung 2 · resolvable
passThe document URL it declared actually answers when fetched.
passed
- elapsed_ms
- 910
- http_status
- 200
- request_url
- https://x402-explorer.hpp.io/agents/ee00ecc3-ab98-40b5-9a7d-258476cc3391/registration.json
- scheme
- https
checked at 2026-10-07T16:54:56.793472Z
Readable?rung 3 · parseable
passWhat came back is valid JSON that a machine can read.
passed
- body_bytes
- 1637
- body_sha256
- 40766f41d6332cbece68cb1992732215df653b8f1d9e01534e4b13a973eb839f
- content_type
- application/json; charset=utf-8
checked at 2026-10-07T16:54:56.793472Z
Follows the spec?rung 4 · conformant
passThe document meets what ERC-8004 requires of it.
passed
- both_fields_present
- false
- legacy_endpoints_field
- false
- may_gaps
- active
- must_violations
- (empty)
- registrations_checked
- 0
- services_field_source
- services
- services_status
- present
- should_gaps
- services[].version, registrations
- spec_commit
- 68fc6765761a10fb26f0692df21c8a6f9d12b1be
checked at 2026-10-07T16:54:56.793472Z
Claims its identity?rung 5 · bound
unclaimedThe document names the on-chain agent it belongs to, rather than leaving it unsaid.
unclaimed — the document made no claim to check
- declared_agent_id
- —
- declared_chain
- —
- declared_registry
- —
- match
- —
- reason
- unclaimed
- registrations_seen
- 0
checked at 2026-10-07T16:54:56.793472Z
Answers?rung 6 · live
passA declared endpoint responds to a probe. Not implemented yet, so nobody passes or fails it.
passed
- endpoints
{"declared":"https://agent.hpp.io/paid/compute/tts-longform","elapsed_ms":1555,"final_url":"https://agent.hpp.io/paid/co… (841 chars — expand)
{"declared":"https://agent.hpp.io/paid/compute/tts-longform","elapsed_ms":1555,"final_url":"https://agent.hpp.io/paid/compute/tts-longform","http_status":404,"index":0,"kind":"https","name":"https://agent.hpp.io/paid/compute/tts-longform","outcome":"not_live","probed":true,"probed_url":"https://agent.hpp.io/paid/compute/tts-longform"}, {"declared":"https://x402-explorer.hpp.io/services/resource/ee00ecc3-ab98-40b5-9a7d-258476cc3391","elapsed_ms":5868,"final_url":"https://x402-explorer.hpp.io/services/service/0xba8a6b555a7a014a3822c962ea0bd778eeb02f11%3A%3As%3A%3Atext-to-speech%20%E2%80%94%20narration%20(50k)?e=ee00ecc3-ab98-40b5-9a7d-258476cc3391","http_status":200,"index":1,"kind":"https","name":"web","outcome":"live","probed":true,"probed_url":"https://x402-explorer.hpp.io/services/resource/ee00ecc3-ab98-40b5-9a7d-258476cc3391"}- endpoints_answered_not_live
- 1
- endpoints_declared
- 2
- endpoints_live
- 1
- endpoints_our_error
- 0
- endpoints_payment_gated
- 0
- endpoints_probeable
- 2
- endpoints_probed
- 2
- endpoints_refused
- 0
checked at 2026-10-07T19:37:51.488079Z
Has feedback?rung 7 · attested
failAt least one on-chain feedback entry names this agent.
did not pass
- distinct_authors
- 0
- feedback_count
- 0
- reason
- no_feedback
checked at 2026-10-07T16:54:56.793472Z
Check it again, now
outside the censusOn-chain snapshot
base- token id
- 64015
- owner
- 0xba8a6b555a7a014a3822c962ea0bd778eeb02f11
- block
- 52,281,733
- observed
- 2026-10-07T16:54:56.796131Z
What the fetch saw
https- scheme
- https
- request url
- https://x402-explorer.hpp.io/agents/ee00ecc3-ab98-40b5-9a7d-258476cc3391/registration.json
- http status
- 200
- content type
- application/json; charset=utf-8
- size
- 1,637 bytes
- sha256
- 40766f41d6332cbece68cb1992732215df653b8f1d9e01534e4b13a973eb839f
- elapsed
- 910 ms
This run
reproducible- run
- c67de707-a82d-4589-8936-acd5a584c720
- chain
- base
- pinned block
- 52,281,733
- agents
- 98,319
- started
- 2026-10-07T06:00:13.662398Z
- finished
- 2026-10-07T19:18:37.899751Z
- checker
- 0.7.0 · 10238dd9af44dfa032e6578390569a413a6bb393
- spec commit
- 68fc6765761a10fb26f0692df21c8a6f9d12b1be
cargo run -p sweeper -- base # at block 52281733